CHEMISTRY - Brilliant Academy

CHEMISTRY

SGAE–756

1. Baryllium Sulphate is less solu-ble in water due to(1) High inflammable energy(2) Low Energy of dissociation(3) Low inflammable energy(4) Lonic band

(SSC Section Officer (Audit)Exam. year 1997)

2. What is the name of that system,which uses radioactivity to decidethe period of materials of-pre-his-toric period ?(1) Radium dating(2) Uranium dating(3) Carbon dating(4) Deuterium dating


3. Cement is made hard with(1) dehydration(2) hydration and dissociation of

water(3) Dissociation of water(4) Polymerisation


4. What happens when a chemicalbond is formed ?(1) energy is always absorbed(2) energy in always released(3) more energy is released than

is absorbed(4) energy is neither released nor

absorbed(SSC Section Officer (Audit)

Exam. year 1997)5. Which among the following is a

carbohydrate ?(1) Nylon(2) Cane-sugar(3) Turpentine(4) Hydrogen peroxide


6. In which of the following statesmaximum iron ore is found ?(1) FeCO3 (2) Fe2O3(3) Fe3O4 (4) FeS2


7. “All the four quantum numbersof two electrons in an atom arenot the same.” It is the law of —(1) Hund’s

(2) Exclusion Principle of Pauli(3) Uncertainty Principle of Hie-

senberg(4) Avogadro’s Law


8. Commercial nitric acid iscoloured because it contains dis-solved :(1) Oxygen(2) Nitrous oxide(3) Nitrogen dioxide(4) Coloured impurities

(SSC Combined Graduate LevelPrelim Exam. 27.02.2000

(First Sitting)9. Fertiliser having high nitrogen

content is :(1) Urea(2) Ammonium sulphate(3) Ammonium nitrate(4) Calcium citrate


(First Sitting)10. Where does the oxygen that

keeps us alive come from?(1) Carbon dioxide(2) Carbonates absorbed from

soil(3) Oxides of minerals(4) Water


(First Sitting)11. The gas used for artificial fruit

ripening of green fruit is —(1) Ethylene (2) Acetylene(3) Ethane (4) Methane


(First Sitting)12. The three elements most needed

in common fertilisers are :(1) Sulphur, Phosphorous and

Sodium(2) Nitrogen, Potassium and

Phosphorous(3) Phosphorous, Sodium and

Nitrogen(4) Calcium, Phosphorous and

Potassium(SSC Combined Graduate Level

Prelim Exam. 27.02.2000(First Sitting)

13. Which one of the following metalspollutes the air of a city havinglarge number of automobiles?(1) Cadmium (2) Chromium(3) Lead (4) Copper


(Second Sitting)14. What is the chemical name for

‘baking soda’?(1) Sodium carbonate(2) Sodium bicarbonate(3) Sodium nitrite(4) Sodium nitrate


(Second Sitting)15. An atomic pile is used for

(1) producing X-rays(2) conducting nuclear fission(3) coducting thermonuclear

fusion(4) accelerating atoms


(Second Sitting)16. Which of the following gases is

present under pressure in softdrinks?(1) Oxygen (2) Nitrogen(3) Carbon dioxide(4) Nitrous oxide

(SSC Section Officer (Audit)Exam. 09.09.2001)

17. The substance which does notexpand on going from liquid stateto solid state is(1) Water (2) Cast-iron(3) Aluminium(4) Type metal


18. The radio-active element used inheart pacemakers is(1) Uranium (2) Deuterium(3) Plutonium (4) Radium


19. The element which is commonlyused in nuclear for producingelectricity by nuclear fission is(1) Radium (2) Plutonium(3) Uranium (4) Deuterium


CHEMISTRY11

http://www.tracker-software.com/buy-now


CHEMISTRY

SGAE–757

20. Table salt gets moist duringrainy season because(1) sodium chloride is hygro-

scopic(2) sodium chloride is deliques-

cent(3) sodium chloride contains

some quantity of sodium iodide(4) sodium chloride contains hy-

groscopic impurities likemagnesium chloride


21. Which of the following is usedas a lubricant in heavy ma-chines?(1) Bauxite (2) Sulphur(3) Phosphorus (4) Graphite


22. The anode in a dry cell consists of(1) Copper (2) Zinc(3) Cadmium (4) Graphite


23. Which of the following is used toiodise common salf ?(1) Potassium iodide(2) Iodine(3) Potassium iodate(4) Sodium iodide


24. Milk is a colloidal system in which:(1) Water is dispersed in fat(2) Fat is dispersed in water(3) Fat and water are dispersed

in each other(4) Fat is dissolved


(First Sitting)

25. The enzyme that convertsglucose to ethyl alcohol is :(1) Invertase (2) Maltase(3) Zymase (4) Diastase


(First Sitting)

26. Silk fibre chemically is :(1) Carbohydrate(2) Fat (3) Protein(4) Cellulose


(First Sitting)

27. Who developed Hydrogen Bomb?(1) Wernher Von Braun(2) J. Robert Oppen Heimer(3) Edward Teller(4) Samuel Cohen


(First Sitting)28. When there are two electrons in

the same orbital, they have:(1) same spin(2) opposite spin(3) same or opposite spin(4) no spin


(Second Sitting)29. Galvanization is the :

(1) deposition of zinc on iron(2) deposition of tin on iron(3) deposition of copper on iron(4) deposition of aluminium on

iron(SSC Combined Graduate Level

Prelim Exam. 24.02.2002(Second Sitting)

30. Fermentation of milk to curd isdue to :(1) Mycobacterium(2) Staphylococcus(3) Lactobacillus(4) Yeasts


(Second Sitting)31. By which organic compound all

the oils are known ?(1) Carbohydrate(2) Protein(3) Hydrocarbon(4) Ester


(Middle Zone)32. The atomic number of carbon is

6 and its atomic mass is 12. Howmany are there protons in thenucleus of carbon ?(1) 6 (2) 12(3) 18 (4) Zero


(Middle Zone)33. Who developed atom bomb ?

(1) Warner Wan Brown(2) J. Robert Openheimer(3) Edward Taylor(4) Samuel Koehen


(Middle Zone)

34. The major harmful gas emittedby automobile vehicle whichcauses air pollution is(1) Carbon Monoxide(2) Methane(3) Carbon dioxide(4) Ozone gas

(SSC CPO Sub-Inspector

Exam. 12.01.2003)

35. The acid used in lead storage cellsis(1) phosphoric acid(2) hydrochloric acid(3) nitric acid(4) sulphuric acid


Exam. 12.01.2003)

36. Milk tastes sour when kept inthe open for sometime due to theformation of(1) lactic acid (2) citric acid(3) acetic acid (4) carbonic acid


Exam. 12.01.2003)

37. What is the most commonly usedsubstance in fluorescent tubes?(1) Sodium oxide and argon(2) Sodium vapour and neon(3) Mercury vapour and argon(4) Mercury oxide and neon


(First Sitting)

38. What is “milk of magnesia”chemically ?(1) Magnesium carbonate(2) Sodium bicarbonate(3) Calcium hydroxide(4) Magnesium hydroxide


(Second Sitting)

39. Soap is prepared by boilingcaustic soda with(1) Alcohol (2) Kerosene oil(3) Glycerine (4) Fats


(Second Sitting)

40. Bronze is an alloy of(1) Copper and Zinc(2) Tin and Zinc(3) Copper and Tin(4) Iron and Zinc


Exam. 07.09.2003)



CHEMISTRY

SGAE–758

41. The natural source of hydro-car-bon is(1) Crude oil (2) Biomass(3) Coal (4) Carbohydrates


Exam. 07.09.2003)42. Which of the following is chiefly

present in LPG (Liquefied Petro-leum Gas) ?(1) Methane (2) Ethane(3) Propane (4) Butane


Exam. 07.09.2003)

43. Which one of the following met-als is used to galvanise iron ?(1) Copper (2) Lead(3) Zinc (4) Mercury


Exam. 07.09.2003)44. Which of the following is not a

precious/semi-precious stone?(1) Sapphire (2) Ruby(3) Pearl (4) Emerald

(SSC Section Officer (CommercialAudit) Exam. 16.11.2003)

45. Which among the following met-als provides amphoteric oxide ?(1) Sodium (2) Silver(3) Aluminium (4) Calcium


46. Humburger effect is otherwiseknown as–(1) Sodium pump(2) Anaerobic metabolism(3) Choloride shift(4) Respiratory product

(SSC Section Officer (Audit)

Exam. 14.12.2003)47. Which among the following ele-

ments is found in maximum per-centage in the human body ?(1) Carbon (2) Hydrogen(3) Nitrozen (4) Oxyzen


Exam. 14.12.2003)48. Which among the following stage

is suitable indicator when solu-tion of sodium carbonate ismixed with sulphuric acid ?(1) Methylene blue(2) Methyl red(3) Phenolphthaline(4) Methyl orange


49 Which among the following ispure matter ?(1) Carbon–dioxide(2) Brass(3) Air(4) Iron


50. Which among the following coalcontains 90 per cent of carbon?(1) Anthracite (2) Bitumen(3) Lignite (4) Peat


51. Bauxite is an alloy of which ofthe following metals ?(1) Aluminium (2) Silver(3) Tin (4) Iron


52. Nucleus of an atom consists of.(1) Proton(2) Neutron(3) Proton and Neutron(4) Electron, Proton and Neutron


53. ‘Milk of Magnesia’ is a suspensionof :(1) magnesium sulphate(2) magnesium carbonate(3) magnesium hydroxide(4) magnesium chloride


(First Sitting)54. Quartz is made of

(1) Calcium Sulphate(2) Calcium Silicate(3) Sodium Sulphate(4) Sodium Silicate


(Second Sitting)55. Which of the following is ozone

depleting pesticide ?(1) D.D.T.(2) Benzene(3) Methyl bromide(4) Ethylene ozonide


Exam. 05.09.2004)56. Galvanised iron is made by coat-

ing iron with(1) Zinc (2) Nickel(3) Chromium (4) Sulphur


Exam. 05.09.2004)

57. Isobars are lines joining placeshaving equal(1) Rainfall(2) Pressure(3) Population(4) Height above sea-level


Exam. 05.09.2004)58. Global warming is mainly due to

accumulation of(1) Oxides of nitrogen(2) Oxides of sulphur(3) Carbon dioxide(4) Carbon monoxide(SSC Tax Assistant (Income Tax &Central Excise) Exam. 05.12.2004)

59. Which is abundant in Gobar gas?(1) Carbon dioxide(2) Methane(3) Oxygen(4) Hydrogen(SSC Tax Assistant (Income Tax &Central Excise) Exam. 05.12.2004)

60. The most suitable vessel for storingconcentrated sulphuric acid is(1) Copper vessel(2) Aluminium vessel(3) Glass vessel(4) Earthen vessel(SSC Tax Assistant (Income Tax &Central Excise) Exam. 05.12.2004)

61. What is the element that is inthe highest percentage in thecomposition of the earth ?(1) Silicon (2) Oxygen(3) Magnesium (4) Iron(SSC Tax Assistant (Income Tax &Central Excise) Exam. 05.12.2004)

62. Formation of ozone hole is maxi-mum over(1) Africa (2) India(3) Antarctica (4) Europe(SSC Tax Assistant (Income Tax &Central Excise) Exam. 05.12.2004)

63. The presence of ozone in thestratosphere is responsible for(1) increasing the average global

temperature in recent years(2) higher rate of photosynthe-

sis(3) checking the penetration of

ultra-violet rays to the earth(4) supplying oxygen for people

travelling in jets(SSC Tax Assistant (Income Tax &Central Excise) Exam. 05.12.2004)



CHEMISTRY

SGAE–759

64. The advantage of detergents oversoaps is(1) Detergents are soluble in

water(2) Detergents could not give

much lather(3) Detergents give lather even

with hard water(4) Soaps give lather with only

soft water(SSC Tax Assistant (Income Tax &Central Excise) Exam. 05.12.2004)

65. The fundamental particles presentin the nucleus of an atom are(1) Electron, proton(2) Proton, neutron(3) Neutron, electron(4) Neutron, positron(SSC Tax Assistant (Income Tax &Central Excise) Exam. 05.12.2004)

66. Bleaching action of moist sulphurdi-oxide is because of its(1) basic property(2) acidic property(3) oxidising property(4) reducing property(SSC Tax Assistant (Income Tax &Central Excise) Exam. 05.12.2004)

67. The long range potential of nu-clear energy in India depends onits reserves of(1) thorium (2) uranium(3) plutonium (4) radium(SSC Tax Assistant (Income Tax &Central Excise) Exam. 05.12.2004)

68. Which of the following gases willeffuse out of football bladdermost quickly ?(1) He (2) H2(3) N2 (4) O2(SSC Tax Assistant (Income Tax &Central Excise) Exam. 05.12.2004)

69. Which of the following alkalimetals has highest specific heat?(1) Caesium (2) Rubidium(3) Potassium (4) Lithium(SSC Tax Assistant (Income Tax &Central Excise) Exam. 05.12.2004)

70. In which of the following sub-stances all carbon atoms arequaternary in nature ?(1) Graphite (2) Diamond(3) Teflon (4) Napthalene(SSC Tax Assistant (Income Tax &Central Excise) Exam. 05.12.2004)

71. Which of the following is a natu-ral dye ?(1) Crystal violet(2) Aniline blue(3) Alizarin(4) Phenolphthalein(SSC Tax Assistant (Income Tax &Central Excise) Exam. 05.12.2004)

72. The ratio of pure gold in 18 caratgold is :(1) 60% (2) 75%(3) 80% (4) 90%


Exam. 26.05.2005)

73. Diamond is harder than graph-ite because of :(1) difference in layers of atoms(2) tetrahedral structure of dia-

mond(3) difference of crystalline struc-

tures(4) None of these


Exam. 26.05.2005)74. Gobar gas contains mainly :

(1) methane (2) ethylene(3) propylene (4) acetylene


Exam. 26.05.2005)75. Which of the following elements

is non-radioactive ?(1) Uranium (2) Thorium(3) Plutonium (4) Zirconium


Exam. 26.05.2005)76. The gas used for artificial fruit

ripening of green fruit is(1) Ethylene (2) Acetylene(3) Ethane (4) Methane


Exam. 26.05.2005)77. What is the element required for

solar energy conversion ?(1) Beryllium(2) Tantalum(3) Silicon(4) Ultra pure carbon


Exam. 26.05.2005)

78. Which of the following type ofcoal has the lowest proportion ofvolatile matter ?(1) Lignite (2) Peat(3) Bituminous (4) Anthracite(SSC Section Officer (Audit) Exam.

05.06.2005)

79. What is the chemical name for‘Baking Soda’ ?(1) Sodium carbonate(2) Sodium bicarbonate(3) Sodium nitrite(4) Sodium nitrate


80. Saccharin is made up of(1) Toluene (2) Phenol(3) Propane (4) Butane


Exam. 05.06.2005)

81. PVC is obtained by the polymer-isation of(1) Propane (2) Vinyl chloride(3) Styrene (4) Acetylene


Exam. 05.06.2005)

82. Which amidst the following is nota gem stone ?(1) Cat’s-eye (2) Topaz(3) Opal (4) Pearl


Exam. 05.06.2005)

83. Which of the following vegetableoils does not contain essentialfatty acids ?(1) Sunflower oil (2) Mustard oil(3) Coconut oil (4)Groundnut oil


84. The metallic constituents of hardwater are :(1) Magnesium, calcium and tin(2) Iron, tin and calcium(3) Calcium, magnesium and iron(4) Magnesium, tin and iron

(SSC Statistical Investigators

Grade–IV Exam. 31.07.2005)

85. The pH of human blood is be-tween :(1) 6.5-7 (2) 7.5-8(3) 8-9 (4) 4.5-5

(SSC Statistical InvestigatorsGrade–IV Exam. 31.07.2005)

86. Which of the following impartsdeep blue colour to glass ?(1) Cobalt oxide(2) Cupric oxide(3) Ferrous oxide(4) Nickel oxide

(SSC Section Officer (Commercial

Audit) Exam. 25.09.2005)



CHEMISTRY

SGAE–760

87. Which of the following fibrescatches fire least ?(1) Nylon (2) Cotton(3) Rayon (4) Terricot


88. Which of the following is usedas filler in tyre of rubber ?(1) Carbon black (2) Coal(3) Coke (4) Graphite


89. Which of the following alloy isused in making magnet ?(1) Duralumin (2) Stainless steel(3) Elniko (4) Magnalium


90. Milk tastes sour when it is leftin open for some time. This hap-pens due to the formation of(1) Lactic acid (2) Citric acid(3) Acetic acid (4) Carbonic acid


91. The polymerisation of which of thefollowing is used in manufactur-ing of polythene in industry ?(1) Methane (2) Styrene(3) Acetylene (4) Ethylene


92. Which of the following chemicalmaterials is responsible for thedepletion of ozone layer in theatmosphere ?(1) Nitrous oxide(2) Carbon dioxide(3) Chlorofluorocarbon(4) Sulphur dioxide


93. Which of the following is themain nitrogenous waste in hu-mans ?(1) Ammonia(2) Urea(3) Uric Acid(4) Ammonium Nitrate


94. Aspirin is(1) Methoxy benzoic acid(2) Methyl Salicilate(3) Acetyl Salicilic acid(4) Phenyl Salicilate


95. Cloud is a colloidal dispersion of(1) Air in a dispersion medium

of water(2) Fog in a dispersion medium

of water(3) Mist in a dispersion medium

of air(4) Water drops in a dispersion

medium of air(SSC Combined Graduate Level

Prelim Exam. 13.11.2005 (First Sitting)

96. Which of the following is the pe-troleum wax ?(1) Bees wax(2) Carnauba wax(3) Paraffin wax(4) Jojoba wax


(First Sitting)97. Which variety of coal contains

recognisable traces of the origi-nal plant material ?(1) Anthracite (2) Lignite(3) Peat (4) Bitumen


(First Sitting)98. Which is the purest form of iron ?

(1) Steel (2) Cast iron(3) Pig iron (4) Wrought iron


(First Sitting)99. Which of the following metals

form an amalgam with othermetals ?(1) Lead (2) Tin(3) Zinc (4) Mercury


(First Sitting)100. Detergents used for cleaning

clothes and utensils contain(1) nitrates(2) bicarbonates(3) sulphonates(4) bismuthates


(Second Sitting)101. Radioactive disintegration of ura-

nium ultimately results in forma-tion of(1) radium (2) thorium(3) polonium (4) lead


(Second Sitting)

102. Which of the following is used inmaking smoke bombs?(1) Sulphur (2) Phosphorus(3) Hydrogen (4) Carbon


(Second Sitting)-

103. German silver is an alloy of(1) copper, nickel and silver(2) silver, copper and aluminium(3) zinc, copper and nickel(4) zinc, silver and copper


(Second Sitting)

104. A metal is exposed to the atmo-sphere for sometime. It becomescoated with green carbonate. Themetal must be(1) silver (2) copper(3) aluminium(4) zinc


(Second Sitting)

105. Which of the following pairs ofmaterials serves as electrodes inchargeable batteries commonlyused in devices such as torchlights, electric shavers, etc. ?(1) Iron and cadmium(2) Nickel and cadmium(3) Lead peroxide and lead(4) Zinc and carbon


(Second Sitting)

106. Which of the following is a su-percooled liquid ?(1) Ice Cream (2) Teflon(3) Glass (4) Mercury(SSC Tax Assistant (Income Tax &Central Excise) Exam. 11.12.2005)

107. Metal are good conductors, be-cause(1) they contain free electrons(2) the molecules in them are

very close to each other(3) the molecules in them collide

very freely(4) they contain reflecting surface(SSC Tax Assistant (Income Tax &Central Excise) Exam. 11.12.2005)

108. The first metal used by a man was(1) Copper (2) Silver(3) Bronze (4) Brass(SSC Tax Assistant (Income Tax &Central Excise) Exam. 11.12.2005)



CHEMISTRY

SGAE–761

109. Which of the following is used toremove rust stains on cloth?(1) Kerosene (2) Lime(3) Oxalic acid solution(4) Petrol(SSC Tax Assistant (Income Tax &Central Excise) Exam. 11.12.2005)

110. Curd is sour due to presence of(1) Tartaric acid (2) Lactic acid(3) Acetic acid (4) Oxalic acid(SSC Tax Assistant (Income Tax &Central Excise) Exam. 11.12.2005)

111. Tear gas is :(1) Chloroprene(2) Carbonyl chloride(3) Nitrous oxide(4) Bleaching powder(SSC Tax Assistant (Income Tax &Central Excise) Exam. 11.12.2005)

112. Which of the following com-pounds is commonly used as anantiseptic in mouthwashes andtoothpastes ?(1) Borax (2) Saltpetre(3) Hydrogen peroxide(4) Sodium chloride(SSC Tax Assistant (Income Tax &Central Excise) Exam. 11.12.2005)

113. Which one of the following is usedto restore the colour of old oil-paintings ?(1) Ozone(2) Hydrogen peroxide(3) Barium peroxide(4) Sodium peroxide(SSC Tax Assistant (Income Tax &Central Excise) Exam. 11.12.2005)

114. Milk is a natural(1) Solution (2) Emulsion(3) Mixture (4) Suspension(SSC Tax Assistant (Income Tax &Central Excise) Exam. 11.12.2005)

115. A polymeric substance used tomake parachute is(1) Rayon (2) Viscose(3) Cotton (4) Terylene(SSC Tax Assistant (Income Tax &Central Excise) Exam. 11.12.2005)

116. Drinking soda is(1) Alkaline (2) Acidic(3) Neutral (4) Oxidant(SSC Tax Assistant (Income Tax &Central Excise) Exam. 11.12.2005)

117. The cathode of a lead storage bat-tery is made up of(1) Zinc (2) Lead(3) Lead oxide(4) Manganese dioxide(SSC Tax Assistant (Income Tax &Central Excise) Exam. 11.12.2005)

118. Which one of the following is ra-dioactive ?

(1) Cesium (2) Platinum(3) Strontium (4) Thorium(SSC Tax Assistant (Income Tax &Central Excise) Exam. 11.12.2005)

119. Heat resistant variety of glassis—

(1) Pyrex glass (2) Hard glass(3) Flint glass (4) None of these

(SSC Statistical InvestigatorsGrade–IV Exam. 13.08.2006)

120. Among the following iron ores,the highest percentage of ironcontent is found in—(1) Haemetite (2) Magnetite

(3) Limnonite (4) None of these(SSC Statistical InvestigatorsGrade–IV Exam. 13.08.2006)

121. Pasteurisation of milk means–(1) heating of milk to above 72°C

(2) heating of milk to above 62°C(3) cooling of milk to about 62°C

(4) cooling of milk to about 10°C(SSC Statistical InvestigatorsGrade–IV Exam. 13.08.2006)

122. Aluminium can be purified by

(1) oxidation (2) distillation(3) electrolysis (4) ozonolysis


Exam. 03.09.2006)

123. Impure camphor is purified by(1) sublimation

(2) fractional crystallisation(3) fractional distillation(4) steam distillation


Exam. 03.09.2006)

124. Greenhouse effect is caused by(1) nitrogen

(2) carbon dioxide(3) carbon monoxide

(4) nitrogen dioxide(SSC CPO Sub-Inspector

Exam. 03.09.2006)

125. Type metal used in printing pressis an alloy of(1) lead and copper

(2) lead and antimony(3) lead and bismuth(4) lead and zinc


Exam. 03.09.2006)

126. Sour taste of ‘Coca Cola’ is dueto the presence of(1) acetic acid(2) phosphoric acid(3) hydrochloric acid(4) formic acid


Exam. 03.09.2006)127. Bhopal gas tragedy is associated

with leakage of(1) carbon dioxide(2) nitrogen dioxide(3) sulphur dioxide(4) methyl isocyanate(SSC Tax Assistant (Income Tax &Central Excise Exam. 12.11.2006)

128. Iodized salt is beneficial for(1) lowering of blood pressure(2) prevention of dehydration(3) thyroid function(4) salivary glands(SSC Tax Assistant (Income Tax &Central Excise Exam. 12.11.2006)

129. The acid rain destroys vegeta-tions because it contains(1) nitric acid(2) ozone(3) carbon monoxide(4) sulphuric acid(SSC Tax Assistant (Income Tax &Central Excise Exam. 12.11.2006)

130. Diamonds are glittering and at-tractive because light incident onthem undergoes(1) highest refraction(2) multiple internal reflections(3) multiple surface reflections(4) hundred percent transmission(SSC Tax Assistant (Income Tax &Central Excise Exam. 12.11.2006)

131. The substance most commonlyused as a food preservative is(1) sodium carbonate(2) tartaric acid(3) acetic acid(4) sodium salt of benzoic acid(SSC Tax Assistant (Income Tax &Central Excise Exam. 12.11.2006)

132. Catalyst is a substance which(1) increases the rate of the re-

action(2) decreases the rate of reaction(3) has no action on the rate of

the reaction(4) None of these(SSC Tax Assistant (Income Tax &Central Excise Exam. 12.11.2006)



CHEMISTRY

SGAE–762

133. Which of the following gases ismost toxic ?(1) Carbon dioxide(2) Carbon monoxide(3) Sulphur dioxide(4) Chlorine(SSC Tax Assistant (Income Tax &

Central Excise Exam. 12.11.2006)

134. Sour milk contains(1) acetic acid (2) tartaric acid(3) citric acid (4) lactic acid(SSC Tax Assistant (Income Tax &


135. The acid used in lead storagecells is(1) phosphoric acid(2) hydrochloric acid(3) nitric acid(4) sulphuric acid(SSC Tax Assistant (Income Tax &


136. Alum stops bleeding in minorcuts because of(1) solvation (2) emulsion(3) dialysis (4) coagulation(SSC Tax Assistant (Income Tax &


137. ‘Plaster of Paris’ is made by par-tial dehydration of(1) epsom salt(2) gypsum salt(3) blue vitriol (4) green vitriol(SSC Tax Assistant (Income Tax &


138. Water can be separated from al-cohol water mixture by(1) decantation (2) evaporation(3) distillation (4) sublimation(SSC Tax Assistant (Income Tax &


139. ‘Milk Sugar’ is(1) Lactose (2) Maltose(3) Galactose (4) Sucrose(SSC Tax Assistant (Income Tax &


140. Petroleum is a mixture of(1) elements (2)hydrocarbons(3) polymers (4) salts

(SSC Section Officer (Commercial AuditExam. 26.11.2006 (Second Sitting)

141. The gas used for filling weatherballoons is(1) helium (2) hydrogen(3) air (4) nitrogen


142. Hydrogen is not found in atmo-sphere because(1) it is highly inflammable(2) it is the lightest gas(3) it is absorbed by plants(4) it immediately combines with

oxygen to form water(SSC Section Officer (Commercial Audit

Exam. 26.11.2006 (Second Sitting)143. Who discovered the atom bomb?

(1) Madam Curie(2) Pierre Curie(3) Otto Hahn(4) Albert Einstein


144. Which one of the following organ-ic compounds has fruity smell?(1) Alcohol (2) Aldehyde(3) Ester (4) Ether


145. What material is used to makeelectric heater coil ?(1) Copper (2) Iron(3) Silver (4) Nichrome


146. By-product obtained by soap-industry is(1) Caustic soda(2) Glycerol(3) Naphthalene(4) Caustic potash


147. Polythene is polymer of(1) Ethylene (2) Propylene(3) Acetylene (4) Aniline


148. For determination of the age ofwhich among the following is car-bon dating method used ?(1) Fossils (2) Rocks(3) Trees (4) 1& 2 above


149. A substance which readily formscolloidal solution in contact withwater is called(1) Extrinsic colloid(2) Associated colloid(3) Hydrophobic colloid(4) Hydrophilic colloid


(Frist Sitting)

150. When formaldehyde and potas-sium hydroxide are heated, weget(1) Acetylene(2) Methyl alcohol(3) Methane(4) Ethyl formate


(Frist Sitting)151. When conc. H2SO4 is added to

dry KNO3, brown fumes areevolved. These fumes are due to(1) SO3 (2) SO2(3) NO2 (4) N2O


(Second Sitting)152. The polymer used in making

plastic crockery is(1) Decron (2) Nylon(3) Bakelite (4) Melamine


(Second Sitting)

153. Vulcanization of rubber is car-ried out by adding(1) Sulphur (2) Carbon(3) Ozone (4) Phosphorus


(Second Sitting)

154. Which of the following is used indating archaeological findings ?

(1)92

235U (2) 6

14C

(3)1

3H (4) 8

18O


(Second Sitting)155. Preparation of ‘Dalda or Van-

aspati’ ghee from vegetable oilutilizes the following process :(1) Hydrolysis (2)Oxidation(3) Hydrogenation(4) Ozonolysis

(SSC Section Officer (CommercialAudit) Exam. 30.09.2007

(Second Sitting)156. Smoke is formed due to

(1) solid dispersed in gas(2) solid dispresed in liquid(3) gas dispresed in solid(4) gas dispersed in gas


(Second Sitting)



CHEMISTRY

SGAE–763

157. Which of the following chemicalsis used in photography ?

(1) Aluminium hydroxide(2) Silver bromide

(3) Potassium nitrate(4) Sodium chloride


(Second Sitting)

158. What is the principal ore of alu-minium ?

(1) Dolomite (2) Copper(3) Lignite (4) Bauxite


(Second Sitting)

159. Which gas is used as fire extin-guisher ?(1) Carbon dioxide

(2) Carbon monoxide(3) Carbon suboxide

(4) Sulphur dioxide(SSC Tax Assistant (Income Tax &Central Excise) Exam. 25.11.2007)

160. Which one of the following is ex-tensively used for sterilizingwater ?(1) Bleaching powder

(2) Alum(3) Borax powder

(4) Soda powder(SSC Tax Assistant (Income Tax &Central Excise) Exam. 25.11.2007)

161. Which one of the following acidsis used in battery ?(1) Hydrochloric acid

(2) Hydrofluoric acid(3) Sulphuric acid(4) Sulphurous acid(SSC Tax Assistant (Income Tax &Central Excise) Exam. 25.11.2007)

162. The major constituent of air is(1) nitrogen (2) carbon dioxide(3) oxygen (4) hydrogen(SSC Tax Assistant (Income Tax &Central Excise) Exam. 25.11.2007)

163. Cream gets separated out of milkwhen it is churned. This is due to

(1) gravitational force(2) centripetal force

(3) centrifugal force(4) frictional force(SSC Tax Assistant (Income Tax &Central Excise) Exam. 25.11.2007)

164. Rusting of iron takes place due to(1) oxidation (2) carbonation(3) exfoliation (4) corrosion(SSC Tax Assistant (Income Tax &Central Excise) Exam. 25.11.2007)

165. German silver used for makingutensils is an alloy of(1) copper, silver, nickel(2) copper, zinc, nickel(3) copper, zinc, aluminium(4) copper, nickel, aluminium


Exam. 16.12.2007)166. The purity of gold is expressed

in carats. The purest form ofgold is(1) 24 carats (2) 99.6 carats(3) 91.6 carats(4) 22 carats


Exam. 16.12.2007)167. Petroleum consists of a mixture of

(1) Carbohydrates(2) Carbonates(3) Hydrocarbons(4) Carbides


Exam. 16.12.2007)168. The lustre of the metals is be-

cause of(1) high density, due to closed

packing of atoms(2) high polish(3) reflection of light due to the

presence of free electrons(4) absorption of light due to the

presence of cavities(SSC CPO Sub-Inspector

Exam. 16.12.2007)169. One of the following is used to

dissolve noble metals. That is(1) Nitric acid(2) Hydrochloric acid(3) Sulphuric acid(4) Aqua ragia

(SSC CPO Sub-InspectorExam. 16.12.2007)

170. An emulsion is a colloid of a(1) gas in a liquid(2) liquid in a liquid(3) liquid in a gas(4) gas in a solid


171. Percentage of carbon in steelranges from(1) 0.1 to 1.5 (2) 1.5 to 3.0(3) 3.0 to 4.0 (4) 4.0 to 6.0


172. Which of the following is notpresent in German-silver?(1) Copper (2) Nickel(3) Silver (4) Zinc


173. The major harmful gas emittedby automobile vehicles whichcauses air pollution is(1) Carbon Monoxide(2) Methane(3) Carbon dioxide(4) Ozone gas


174. Which one of the following is amajor green house gas?(1) Carbon dioxide(2) Chloro fluorocarbon(3) Carbon monoxide(4) Freon


175. Pasteurisation is the process inwhich milk is heated to(1) 60°C for 10 minutes(2) 63° C for 20 minutes(3) 63°C for 30 minutes(4) 72°C for 10 minutes


176. The freezer in a refrigerator isfitted near the top(1) to keep it away from hot

compressor which is nearerto the bottom

(2) because of convenience(3) it facil itates convection

currents(4) to minimise power

consumption(SSC Section Officer (Audit)

Exam. 06.01.2008)177. The chemical name of ‘Common

salt’ is(1) Sodium chloride(2) Sodium nitrate(3) Ammonium chloride(4) Calcium chloride


178. Denatured spirit is ethanol mixedwith(1) Petrol (2) Kerosene(3) Water (4) Pyridine


179. The most abundant inert gas inthe atmosphere is(1) Helium (2) Neon(3) Argon (4) Krypton




CHEMISTRY

SGAE–764

180. Which metal is extracted fromsea water?(1) Potassium (2) Magnesium(3) Aluminium (4) Beryllium


181. Percentage of lead in leadpencils is(1) 0 (2) 31-66(3) 40 (4) 80


182. Water is not effective in extin-guishing a fire caused by petrolbecause(1) the flame is too hot for water

to cool it down(2) water and petrol react chem-

ically(3) water and petrol are misci-

ble with each other(4) water and petrol are immis-

cible with each other andpetrol which forms the up-per layer continues to burn(SSC Combined Graduate Level

Prelim Exam. 27.07.2008 (First Sitting)

183. Helium gas is used in gas bal-loons instead of hydrogen gas be-cause it is(1) lighter than hydrogen(2) more abundant than hydrogen(3) non-combustible(4) more stable


(First Sitting)

184. The gas used in the artificial rip-ening of fruits is(1) Acetylene (2) Methane(3) Ethane (4) Butane


(First Sitting)185. Ruby and sapphire are oxides of

(1) copper (2) tin(3) iron (4) aluminium


(First Sitting)186. The gas which turns into liquid

at the lowest temperature amongthe following is(1) hydrogen (2) oxygen(3) helium (4) nitrogen


(Second Sitting)

187. Gunpowder consits of a mixture of(1) sand and TNT(2) TNT and charcoal(3) nitre, sulphur and charcoal(4) sulphur, sand and charcoal


(Second Sitting)188. In nuclear reactors, graphite is

used as a/an(1) fuel (2) lubricant(3) moderator (4) insulator


(Second Sitting)189. Sea water can be purified by the

process of(1) distillation(2) evaporation(3) filtration(4) fractional distillation


190. Detergents clean surfaces on theprinciple of(1) viscosity(2) surface tension(3) elasticity(4) floatation


191. The compound to which H2 doesnot add is(1) Biphenyl ethylene(2) Tetraphenyl ethylene(3) Tetra – a –naphthylethylene(4) Tetra –9 – phenanthryleth-

ylene(SSC CPO Sub-Inspector

Exam. 09.11.2008)192. Ammonial is a mixture of

(1) aluminium powder and ammo-nium nitrate

(2) aluminium powder and ammo-nium chloride

(3) aluminium powder and ammo-nium sulphate

(4) aluminium powder and potas-sium nitrate


193. Which gas does not form the partof atmosphere ?(1) Nitrogen (2) Helium(3) Chlorine(4) None of the above


194. The fuel used in an atomic reac-tor is(1) Coal(2) Petrol(3) Combustable gases(4) Uranium


195. White coal is(1) Uranium(2) Hydro-electricity(3) Diamond(4) Ice


196. The major constituent of gobargas is(1) Carbon dioxide(2) Methane(3) Butane(4) Isobutane


197. The residue left after extractingjuice from sugarbeet and sugar-cane is called(1) molasses (2) bagasse(3) whey (4) biomass


198. The isotope of Uranium used inatomic reactors is(1) U235 (2) U236

(3) U237 (4) U232


199. Which one of the following is nota radio-active element ?(1) Uranium (2) Thorium(3) Radium (4) Cadmium


200. The greenhouse effect is causedby the higher level of which gasin the atmosphere ?(1) Carbon monoxide(2) Carbon dioxide(3) Nitrous oxide(4) Sulphur dioxide


201. Candle is a mixture of(1) Paraffin was and stearic acid(2) Bees wax and stearic acid(3) Higher fatty acids and stearic

acid(4) Bees wax and paraffin wax


202. Ethanol containing 5% water isknown as(1) rectified spirit(2) denatured spirit(3) methylated alcohol(4) power alcohol




CHEMISTRY

SGAE–765

203. The important ore of aluminium is(1) bauxite (2) cryolite(3) fluorspar (4) haematite


204. Aqua regia is a 1 : 3 mixture, byvolume, of(1) conc. nitric acid and conc.

hydrochloric acid(2) conc. hydrochloric acid and

conc. nitric acid(3) conc. nitric acid and conc.

sulphuric acid(4) conc. sulphuric acid and conc.

nitric acid(SSC Section Officer (Audit)

Exam. 30.11.2008)

205. What is the maximum Water Va-pour content in the atmosphere?(1) 2 to 3 per cent(2) 3 to 4 per cent(3) 4 to 5 per cent(4) 5 to 6 per cent


206. The amount of chlorine availablein water after disinfection iscalled as(1) free chlorine(2) residual chlorine(3) free available chlorine(4) combined available chlorine(SSC Tax Assistant (Income Tax &Central Excise) Exam. 14.12.2008)

207. What are the major pollutants ofcigarette smoke?(1) Carbon monoxide and dioxin(2) Carbon monoxide and nicotine(3) Carbon monoxide and benzene(4) Dioxin and benzene(SSC Tax Assistant (Income Tax &Central Excise) Exam. 14.12.2008)

208. Nuclear energy is a mineral-based energy source. It is de-rived from(1) uranium (2) thorium(3) plutonium (4) All of the above(SSC Tax Assistant (Income Tax &Central Excise) Exam. 14.12.2008)

209. Zinc sulphide is commonly usedas(1) fungicide (2) herbicide(3) rodenticide(4) deodorant(SSC Tax Assistant (Income Tax &

Central Excise) Exam. 14.12.2008))

210. The purest form of water is(1) tap water(2) rain water(3) ground water(4) distilled water(SSC Tax Assistant (Income Tax &Central Excise) Exam. 14.12.2008)

211. The main constituent of biogas is(1) oxygen (2) methane(3) acetic acid (4) methyl alcohol(SSC Tax Assistant (Income Tax &Central Excise) Exam. 14.12.2008)

212. Aspirin is chemically known as(1) methyl salicylate(2) hydroxysalicylate(3) acetylsalicylic acid(4) alkylsalicylic acid(SSC Tax Assistant (Income Tax &Central Excise) Exam. 14.12.2008)

213. The most abundant element inthe human body is(1) carbon (2) iron(3) nitrogen (4) oxygen(SSC Tax Assistant (Income Tax &Central Excise) Exam. 14.12.2008)

214. Which of the following is not agreenhouse gas ?(1) Hydrogen(2) Carbon dioxide(3) Nitric oxide(4) Chlorofluorocarbon(SSC Tax Assistant (Income Tax &Central Excise) Exam. 14.12.2008)

215. Wax used for making candle ischemically a mixture of(1) aliphatic hydrocarbons(2) aromatic hydrocarbons(3) cyclic hydrocarbons(4) aliphatic and aromatic hydro-

carbons(SSC Tax Assistant (Income Tax &Central Excise) Exam. 14.12.2008)

216. Litmus is obtained from(1) a bacterium (2) a fungus(3) an alga (4) lichen(SSC Tax Assistant (Income Tax &Central Excise) Exam. 14.12.2008)

217. Vinegar made by fermentationfrom cane sugar contains(1) palmitic acid (2) lactic acid(3) citric acid (4) acetic acid(SSC Tax Assistant (Income Tax &Central Excise) Exam. 14.12.2008)

218. Photooxidation process is initiat-ed by(1) light (2) heat(3) oxygen (4) catalyst(SSC Tax Assistant (Income Tax &Central Excise) Exam. 14.12.2008)

219. Ultraviolet radiation striking theearth is due to the depletion of(1) carbon monoxide(2) carbon dioxide(3) ozone(4) oxygen(SSC Tax Assistant (Income Tax &Central Excise) Exam. 14.12.2008)

220. Major gaseous pollutant of thethermal power station is(1) H2S (2) NH3(3) NO2 (4) SO2(SSC Tax Assistant (Income Tax &Central Excise) Exam. 29.03.2009)

221. The process of removing calci-um and magnesium from hardwater is known as(1) Sedimentation(2) Filtration(3) Flocculation(4) Water softening(SSC Tax Assistant (Income Tax &Central Excise) Exam. 29.03.2009)

222. The tip of the match-stick contains(1) phosphorus pentoxide(2) white phosphorus(3) red phosphorus(4) phosphorus trichloride(SSC Tax Assistant (Income Tax &Central Excise) Exam. 29.03.2009)

223. Match the sourc in Column Bwith the product of Column A.Column A Column B(Product) (Source)(a) Formic acid (1) Lemon(b) Citric acid (2) Tamarind(c) Tartaric acid (3) Ants

a b c(1) 3 2 1(2) 3 1 2(3) 2 3 1(4) 2 1 3(SSC Tax Assistant (Income Tax &Central Excise) Exam. 29.03.2009)

224. Commercially, sodium bicarbon-ate is known as(1) Washing soda(2) Baking soda(3) Bleaching powder(4) Soda ash(SSC Tax Assistant (Income Tax &Central Excise) Exam. 29.03.2009)

225. An emulsifier is an agent which(1) stabilises an emulsion(2) aids the flocculation of an

emulsion(3) accelerates the dispersion(4) homogenises an emulsion(SSC Tax Assistant (Income Tax &Central Excise) Exam. 29.03.2009)



CHEMISTRY

SGAE–766

226. Mortar is a mixture of water,sand and(1) Slaked lime (2) Quick lime(3) Limestone (4) Gypsum(SSC Tax Assistant (Income Tax &Central Excise) Exam. 29.03.2009)

227. Which of the following substanceis highly plastic ?(1) Quartz (2) Mica(3) Granite (4) Clay(SSC Tax Assistant (Income Tax &Central Excise) Exam. 29.03.2009)

228. The National Chemical Laborato-ry (India) is located in(1) Mumbai (2) Bangaluru(3) Hyderabad(4) Pune(SSC Tax Assistant (Income Tax &Central Excise) Exam. 29.03.2009)

229. Aspirin is common name of(1) Salicylic Acid(2) Salicylate(3) Methyl Salicylate(4) Acetyl Salicylic Acid


Exam. 06.09.2009)230. Carbon monoxide is an inflam-

mable gas. Which one of the fol-lowing is also inflammable?(1) Helium (2) Nitrogen(3) Oxygen (4) Hydrogen


231. Which one of the following metalsdoes not react with water to pro-duce Hydrogen ?(1) Potassium (2) Cadmium(3) Sodium (4) Lithium


232. Ozone consists of(1) Oxygen only(2) Oxygen and Nitrogen(3) Hydrogen and Carbon(4) Oxygen and Carbon


233. One of the constituents of teargas is(1) Ethane (2) Ethanol(3) Ether (4) Chloropicrin

(SSC Combined Graduate LevelTier-I Exam. 16.05.2010

(First Sitting)234. An atomic clock is based on tran-

sitions in(1) Sodium (2) Caesium(3) Magnesium (4) Aluminium


(First Sitting)

235. Silver halides are used in pho-tographic plates because they are(1) oxidised in air(2) soluble in hyposolution(3) reduced by light(4) totally colourless


(Second Sitting)236. Tetra ethyle lead (TEL) is

(1) a catalyst in burning fossil fuel(2) an antioxidant(3) a reductant(4) an antiknock compound


(Second Sitting)237. The isotope used for the produc-

tion of atomic energy is(1) U-235 (2) U-238(3) U-234 (4) U-236


(Second Sitting)238. Which of the following is not a

nucleon?(1) Proton (2) Neutron(3) Electron (4) Positron


(Second Sitting)239. The material used in the manu-

facture of lead pencil is(1) Graphite (2) Lead(3) Carbon (4) Mica


(Second Sitting)240. If all bullets could not be re-

moved from gun shot injury of aman, it may cause poisoning by(1) Mercury (2) Lead(3) Iron (4) Arsenic


(Second Sitting)241. German silver, an alloy, does not

contain the metal(1) Nickel (2) Zinc(3) Copper (4) Silver

(SSC SAS Exam. 26.06.2010(Paper-1)

242. Oxygen which is vital for life is aproduct of photosynthesis andcomes from(1) carbonates from soil(2) carbon dioxide(3) water(4) oxides of mineral elements


243. Detergents are(1) Sodium salts of fatty acids(2) Sodium salts of sulphonic

acids(3) Sodium salt of benzoic acid(4) None of the above


244. The noble gas used in radiother-apy is(1) neon (2) argon(3) radon (4) xenon


245. Steel contains(1) 0.1 – 2% carbon(2) 5 – 10% carbon(3) more than 10% carbon(4) no carbon


246. The chemical(s) most commonlyused for cloud seeding or ‘artifi-cial rainmaking’ is/are(1) Silver Iodide(2) Sodium Chloride(3) Dry ice or frozen carbon di-

oxide(4) All the above


247. The substance that is added tomake natural rubber strong andmore bouncy is(1) Polythene (2) Sponge(3) Sulphur (4) Chlorine

(SSC CISF ASI Exam. 29.08.2010(Paper-1)

248. White phosphorus is always keptunder(1) benzene (2) kerosene(3) ether (4) water

(SSC CISF ASI Exam. 29.08.2010(Paper-1)

249. Galena is a mineral of(1) iron (2) gold(3) lead (4) calcium

(SSC (South Zone) InvestigatorExam. 12.09.2010)

250. Magnalium is an alloy of(1) Aluminium and Magnesium(2) Magnesium and Tin(3) Aluminium and Zinc(4) Manganese and Magnesium


251. Galvanization of iron is carriedout using(1) Zinc (2) Tin(3) Copper (4) Chromium




CHEMISTRY

SGAE–767

252. Cokking gas is a mixture of(1) methane and ethylene(2) carbon dioxide and oxygen(3) butane and propane(4) carbon monoxide and carbon

dioxide(SSC CPO Sub-Inspector

Exam. 12.12.2010 (Paper-1)253. Dry powder fire extinguishers

contain(1) sand(2) sand and sodium carbonate(3) sand and potassium carbonate(4) sand and sodium bicarbonate


Exam. 12.12.2010 (Paper-1)254. Which type of glass is used for

making glass reinforced plastic?(1) Pyrex glass (2) Flint glass(3) Quartz glass (4) Fibre glass

(SSC CPO Sub-InspectorExam. 12.12.2010 (Paper-1)

255. Two elements which are used toabsorb neutrons to control thechain reaction during nuclear fis-sion are(1) Boron and Cadmium(2) Boron and Plutonium(3) Cadmium and Uranium(4) Uranium and Boron

(SSC CPO Sub-InspectorExam. 12.12.2010 (Paper-1)

256. The most commonly used chem-icals in the artificial rainmakingor cloud seeding are(1) Silver Iodide (Ag I)(2) Sodium Chloride (NaCl)(3) Dry Ice (Frozen CO2)(4) All of the above


Exam. 12.12.2010 (Paper-1)257. Which of the following can be used

to absorb neutrons to control thechain reaction during nuclearfission ?(1) Boron (2) Heavy water(3) Uranium (4) Plutonium


(First Sitting)258. Hydrogen bomb is based on the

principle of(1) controlled fission reaction(2) uncontrolled fission reaction(3) controlled fusion reaction(4) uncontrolled fusion reaction


(First Sitting)

259. Supersonic jet causes pollutionby thinning of(1) O3 layer (2) O2 layer(3) SO2 layer (4) CO2 layer


(First Sitting)260. Which type of glass is used for

making glass reinforced plastic?(1) Pyrex glass (2) Flint glass(3) Quartz glass (4) Fibre glass


(First Sitting)261. Which of the following metals

causes Itai-Itai disease ?(1) Cadmium (2) Chromium(3) Cobalt (4) Copper


(First Sitting)262. Glycol is added to aviation

gasoline because it(1) reduces evaporation of petrol(2) increases efficiency of petrol(3) prevents freezing of petrol(4) reduces consumption of petrol


(First Sitting)263. Which one of the following

minerals is found in Monazitesand ?(1) Potassium (2) Uranium(3) Thorium (4) Sodium


(Second Sitting)264. Now-a-days yellow lamps are

frequently used as street lights.Which of the following gases isused in these lamps ?(1) Sodium (2) Neon(3) Hydrogen (4) Nitrogen


(Second Sitting)265. The element which is used for

vulcanizing rubber(1) Sulphur (2) Bromine(3) Silicon (4) Phosphorus


(Second Sitting)266. Which of the following is

responsible for the extra strengthof pyrex glass ?(1) Potassium Carbonate(2) Lead Oxide(3) Borax(4) Ferric Oxide


(Second Sitting)

267. Which of the following could beused as fuel in propellant orrockets ?(1) Liquid Hydrogen + Liquid

Nitrogen(2) Liquid Oxygen + Liquid Ar-

gon(3) Liquid Nitrogen + Liquid

Oxygen(4) Liquid Hydrogen + Liquid

Oxygen(SSC Combined Graduate Level

Tier-I Exam. 26.06.2011(First Sitting)

268. The addition of gypsum to port-land cement helps in :(1) increasing the strength of ce-

ment(2) rapid setting of cement(3) preventing rapid setting of

cement(4) reduction in the cost of

cement(SSC Combined Graduate Level

Tier-I Exam. 26.06.2011

(First Sitting)

269. The constituents of automobileexhaust that can cause canceris/are :(1) Oxides of nitrogen(2) Carbon monoxide(3) Polycyclic hydrocarbons(4) Lead


(First Sitting)270. Hard steel contains

(1) 2 to 5 per cent carbon(2) 0.5 to 1.5 per cent carbon(3) 0.1 to 0.4 per cent carbon(4) 0.01 to 0.04 per cent carbon


(Second Sitting)271. Cement is formed by strongly

heating a mixture of(1) limestone and graphite(2) limestone and clay(3) chalk and graphite(4) clay and graphite


(Second Sitting)272. Glass is a

(1) superheated solid(2) supercooled liquid(3) supercooled gas(4) superheated liquid


(Second Sitting)



CHEMISTRY

SGAE–768

273. The temperature of oxy-acetyleneflame is around(1) 2800°C (2) 3200°C(3) 4000°C (4) 1500°C


(Second Sitting)274. The Refrigerant ‘FREON' is

(1) Calcium Tetra Fluoride(2) Difluoro Dichloro Methane(3) Fluorspar and Felspar(4) Hydrofluosilicic Acid


(Second Sitting)275. A balloon filled with helium rises

in air because(1) air exerts an upward force

on the balloon(2) the balloon is weightless(3) helium is less dense than air(4) helium pushes down on the

air below the balloon(SSC CPO (SI, ASI & Intelligence

Officer) Exam. 28.08.2011 (Paper-1)276. Glass is a –

(1) pure solid(2) supercooled liquid(3) gel(4) polymer

(SSC CPO (SI, ASI & IntelligenceOfficer) Exam. 28.08.2011 (Paper-1)

277. Uranium eventually decays intoa stable isotope of –(1) Radium (2) Thorium(3) Lead (4) Polonium


278. Which of the toxic heavy metalsis found in modern tannery in-dustries ?(1) Nickel (2) Zinc(3) Chromium(4) Lead


279. Which of the following containshigh content of lead?(1) Coal(2) Cooking gas(3) High octane fuel(4) Low octane fuel


280. Stainless steel is an alloy of(1) chromium and carbon(2) chromium, carbon and iron(3) chromium and iron(4) carbon and iron

(FCI Assistant Grade-IIExam. 22.01.2012 (Paper-1)

281. For generation of biogas, thematerials commonly used are(1) Animal wastes(2) Crop residues

(3) Aquatic plants(4) Forest residues


282. Raw materials used for the man-ufacture of glass are(1) sand, soda, limestone(2) sand, charcoal, soda(3) limestone, charcoal, sulphur(4) sand, sulphur, soda


283. Which of the following is used inwelding broken pieces of ironrails and machine parts?(1) Aluminium sulphate(2) Solder(3) Aluminium powder(4) None of the above


284. The BOD values of water indi-cate the(1) amount of organic debris(2) amount of oxygen used for

biochemical oxidation(3) amount of oxygen used for

biochemical reduction(4) amount of ozone used for

biochemical oxidation(FCI Assistant Grade-II

Exam. 22.01.2012 (Paper-1)285. Which of the following produces

highest amount of energy uponoxidation?(1) Protein (2) Fat(3) Glucose (4) An alkane

(FCI Assistant Grade-IIIExam. 5.02.2012 (Paper-1)

286. The metals commonly used forelectroplating are(1) Gold, Sodium and Chromium(2) Chromium, Copper and Nickel(3) Nickel, Lead and Chromium(4) Gold, Sodium and Potassium


287. Which of the following in auto-mobile exhaust can cause cancer?(1) Oxides of nitrogen(2) Carbon monoxide(3) Lead(4) Polyclinic hydrocarbons


288. Bleaching powder is used indrinking water as a/an(1) disinfectant (2) antibiotic(3) antiseptic (4) coagulant


289. The iron ore which contains 72%of iron is :(1) Magnetite (2) Limonite(3) Haematite (4) Siderite

(FCI Assistant Grade-III

Exam. 5.02.2012 (Paper-1)290. Cement is usually a mixture of :

(1) Calcium silicate and calciumaluminate

(2) Calcium silicate and calciumferrate

(3) Calcium aluminate and cal-cium ferrate

(4) Lime stone and silicon dioxide(FCI Assistant Grade-III

Exam. 5.02.2012 (Paper-1)

291. The atmospheric gas that ismainly responsible for GreenHouse effect :(1) Ozone (2) Nitrogen(3) Oxygen (4) Carbondioxide


Exam. 5.02.2012 (Paper-1)292. Electric bulbs are filled with :

(1) Nitrogen(2) Carbon dioxide(3) Argon(4) Oxygen


Exam. 5.02.2012 (Paper-1)

293. The purest form of Iron is :(1) Cast iron (2) Steel(3) Pig iron (4) Wrought iron


Exam. 5.02.2012 (Paper-1)

294. The gas that is used in the man-ufacture of vanaspati ghee is :(1) Oxygen(2) Carbon dioxide(3) Hydrogen(4) Nitrogen


Exam. 5.02.2012 (Paper-1)

295. The anode of a dry cell is madeup of(1) Iron (2) Cadmium(3) Zinc (4) Lead(SSC Combined Matric Level (PRE)

Exam. 24.10.1999 (Ist Sitting)

296. An example of semiconductor is(1) German silver(2) Germanium(3) Phosphorous(4) Arsenic(SSC Combined Matric Level (PRE)




CHEMISTRY

SGAE–769

297. Non-stick kitchenwares arecoated with(1) PVC (2) Graphite(3) Teflon (4) Silicon(SSC Combined Matric Level (PRE)


298. Gobar gas mainly contains(1) Carbon dioxide(2) Carbon monoxide(3) Hydrogen sulphide(4) Methane(SSC Combined Matric Level (PRE)


299. The chief constituent of vinegar is(1) Formic acid(2) Acetic acid(3) Salycylic acid(4) Oxalic acid(SSC Combined Matric Level (PRE)


300. Sea weeds are importantsource of(1) iron (2) chlorine(3) bromine (4) iodine(SSC Combined Matric Level (PRE)


301. The fiber least prone to catch fireis(1) nylon (2) polyester(3) cotton (4) terylene(SSC Combined Matric Level (PRE)


302. Setting of plaster of paris in-volves(1) dehydration process(2) hydration to form other hy-

drates(3) oxidation process(4) reduction process(SSC Combined Matric Level (PRE)


303. The common name for the com-pound having formal NaOH is(1) Caustic soda(2) Caustic potash(3) Soda ash(4) Sodium hydroxide(SSC Combined Matric Level (PRE)


304. Which one of the following isfound in kidney stones?(1) Sodium oxalate(2) Calcium oxalate(3) Sodium chloride(4) Calcium acetate(SSC Combined Matric Level (PRE)


305. Bone ash contains(1) Calcium sulphate(2) Phosphoric sulphate(3) Calcium phosphate(4) Calcium hypophosphate(SSC Combined Matric Level (PRE)


306. Helium gas is filled in ballons be-cause(1) its atomic number is 2(2) it is lighter than air(3) it is one of the constitutents

of water(4) it is a noble gas(SSC Combined Matric Level (PRE)


307. The ratio of pure gold in 18 caratgold is(1) 100% (2) 80%(3) 75% (4) 60%(SSC Combined Matric Level (PRE)


308. Acid secretion is characteristicof(1) Buccal cavity(2) Stomach(3) Small intestine(4) Large intestine(SSC Combined Matric Level (PRE)

Exam. 24.10.1999 (IInd Sitting)

309. Which one of the following is nota fertilizer?(1) Ammonium sulphate(2) Calcium sulphate(3) Calcium ammonium nitrate(4) Potassium nitrate(SSC Combined Matric Level (PRE)


310. Slag is a name given for(1) molten iron(2) molten sand(3) molten alumina(4) molten calcium silicate(SSC Combined Matric Level (PRE)


311. Which one of the followingstatements is not correct?Vulcanisation of rubber makes it

(1) soft and flexible(2) strong and hard(3) chemical resistant(4) withstand higher temperatures(SSC Combined Matric Level (PRE)


312. Stainless steel is usually madeby alloying the steel with(1) copper and nickel(2) copper and chromium(3) chromium and nickel(4) manganese and copper(SSC Combined Matric Level (PRE)


313. Which one of the following organiccompound is used to removestains of iron compounds?(1) Oxalic acid(2) Benzoic acid(3) Phthalic acid(4) Cinnamic acid(SSC Combined Matric Level (PRE)


314. Which one of the following isused as a sowing agent in thepreparation of soft drinks?(1) Phosphoric acid(2) Phosphorus acid(3) Salicylic acid(4) Boric acid(SSC Combined Matric Level (PRE)

Exam. 24.10.1999 (IInd Sitting)315. The coating of a thin layer of zinc

on steel or iron objects is knownas(1) Hot dipping(2) Tinning(3) Galvanising(4) Electroplating(SSC Combined Matric Level (PRE)

Exam. 24.10.1999 (IInd Sitting)316. Which one of the following gases

has the highest calorific value?(1) Natural gas (2)Water gas(3) Coal gas (4) Indane gas(SSC Combined Matric Level (PRE)

Exam. 24.10.1999 (IInd Sitting)317. Which type of radiations are ab-

sorbed by the upper layer of theatmosphere?(1) Radio-waves (2) Infrared(3) Visible (4) Ultraviolet(SSC Combined Matric Level (PRE)

Exam. 21.05.2000 (Ist Sitting)(East Zone)

318. An example of replenshibleenergy source is—(1) Coal (2) Petroleum(3) Lignite (4) Biomass(SSC Combined Matric Level (PRE)

Exam. 21.05.2000 (Ist Sitting)(East Zone)

319. Which one of the followingminerals is found in pure form?(1) Iron (2) Copper(3) Bauxite (4) Manganese(SSC Combined Matric Level (PRE)

Exam. 21.05.2000 (Ist Sitting)(Riapur, Madhya Pradesh)



CHEMISTRY

SGAE–770

320. Tar roads get damaged if there is(1) stagnation of water on road(2) heavy traffic(3) no maintenance(4) no sloping(SSC Combined Matric Level (PRE)


321. The drug ‘Marijuana’ is a(1) sedative(2) mental stimulant(3) hallucinating substance(4) tranquillizer(SSC Combined Matric Level (PRE)


322. The material known in commerceas Terylene is a(1) Synthetic fibre(2) Natural fibre(3) Modified natural fibre(4) Blend of cotton and silk(SSC Combined Matric Level (PRE)


323. Among the fuels given below, theone with highest calorific value is(1) Coke (2) Coal(3) Wood (4) Natural gas(SSC Combined Matric Level (PRE)


324. The chemical used in embalm-ing biological materials is(1) formaldehyde in water(2) formaldehyde in methanol(3) ethylene glycol(4) gaseous formaldehyde(SSC Combined Matric Level (PRE)


325. Which of the following is a mono-atomic gas?(1) Oxygen (2) Neon(3) Nitrogen (4) Fluorine(SSC Combined Matric Level (PRE)


326. Sodium bicarbonate is commer-cially known as(1) Washing soda(2) Baking soda(3) Caustic soda(4) Soda lime(SSC Combined Matric Level (PRE)


327. Coal is formed from(1) crude oil(2) deposit of animal waste(3) coke(4) compressed and hardened

biomass(SSC Combined Matric Level (PRE)

Exam. Held on : 21.05.2000 (Ist Sitting (Middle Zone)

328. Commercial Vaseline is derivedfrom(1) plant gums (2) coal tar(3) wool wax (4) petroleum(SSC Combined Matric Level (PRE)

Exam. 21.05.2000 (Ist Sitting)(Middle Zone)

329. Colour imparted to the Bunsenflame by strontium salt is(1) bluish green(2) apple-green(3) brick red(4) crimson red(SSC Combined Matric Level (PRE)


330. A potato tuber has been cut intotwo halves. A few drops of io-dine solution are placed on thecut surface of one of the halves.What colour change will be no-ticed?(1) From brown to blue-black(2) From brown to orange-red(3) From blue to pink(4) From pink to blue-green(SSC Combined Matric Level (PRE)


331. Tear gas used by the police todisperse the mob contains(1) Carbon dioxide(2) Chlorine(3) Ammonia(4) Hydrogen sulphide(SSC Combined Matric Level (PRE)

Exam. 13.05.2001 (Ist Sitting)332. Epsom salt is used

(1) as purgative(2) in softening water(3) in paper industry(4) in making tooth paste(SSC Combined Matric Level (PRE)

Exam. 13.05.2001 (Ist Sitting)333. The common refrigerant in

domestic refrigerator is(1) Neon (2) Oxygen(3) Nitrogen (4) Freon(SSC Combined Matric Level (PRE)

Exam. 13.05.2001 (Ist Sitting)334. The chemical name of “laughing

gas’ is(1) Nitric oxide(2) Nitrogen dioxide(3) Nitrogen pentoxide(4) Nitrous oxide(SSC Combined Matric Level (PRE)

Exam. 13.05.2001 (IInd Sitting)335. Brass is an alloy of

(1) Lead and tin(2) Zinc and copper(3) Antimony, tin and lead(4) Zinc, tin and copper(SSC Combined Matric Level (PRE)

Exam. 13.05.2001s (IInd Sitting)

336. The chemical name of ratpoison is(1) zinc oxide(2) potassium cyanide(3) lead nitrate(4) zinc phosphide(SSC Combined Matric Level (PRE)

Exam. 27.05.2001 (IInd Sitting)(East Zone)

337. Which one of the following pairsis NOT correctly matched?(1) Haematite : Copper(2) Bauxite : Aluminium(3) Monazite : Thorium(4) Pitchblende : Uranium(SSC Combined Matric Level (PRE)


338. Which of the following is usedfor refrigeration?(1) Sulphur dioxide(2) Chlorine(3) Freon(4) Phosphine(SSC Combined Matric Level (PRE)


339. Which of the following is used todenature ethanol ?(1) Methyl alcohol(2) Propyl alcohol(3) Phenol(4) Methane(SSC Combined Matric Level (PRE)

Exam. 05.05.2002 (Ist Sitting)(Eastern Zone, Guwahati)

340. The charcoal used to decolourisebrown sugar solution is(1) Wood charcoal(2) Coconut charcoal(3) Animal charcoal(4) Sugar charcoal(SSC Combined Matric Level (PRE)

Exam. 05.05.2002 (Ist Sitting)(Eastern Zone, Guwahati)

341. The gas which is mainly respon-sible for the green house effect is:(1) Ozone(2) Oxygen(3) Carbon dioxide(4) Carbon monoxide(SSC Combined Matric Level (PRE)

Exam. 05.05.2002 (Ist Sitting)(Eastern Zone, Guwahati

342. Which one of the following isused for dating very old objectsof archaeological importance?(1) Phosphorus-31(2) Tritium(3) Radium(4) Carbon-14(SSC Combined Matric Level (PRE)




CHEMISTRY

SGAE–771

343. The main constituent of naturalgas is(1) Methane (2) Ethane(3) Butane (4) Propane(SSC Combined Matric Level (PRE)


344. Domestic cooking gas consistsmostly of(1) methane and ethane(2) liquified butane and isobutane(3) hydrogen and acetylene(4) ethylene and carbon monox-

ide(SSC Combined Matric Level (PRE)


345. Chemically ‘Quick Silver isknown as(1) Mercury (2) Silver(3) Gold (4) Copper(SSC Combined Matric Level (PRE)

Exam. 05.05.2002 (IInd Sitting)(Eastern Zone, Guwahati)

346. Extensively used nitrogenousfertilizer is(1) Ammonium nitrate(2) Urea(3) Ammonium sulphate(4) Nitro-lime(SSC Combined Matric Level (PRE)


347. The metal, used to galvanise ironto protect it from rusting is(1) Zinc (2) Chromium(3) Lead (4) Antimony(SSC Combined Matric Level (PRE)


348. Which of the following gases ismixed with oxygen for breathingby divers in aqualungs?(1) Methane (2) Nitrogen(3) Helium (4) Hydrogen(SSC Combined Matric Level (PRE)

Exam. 05.05.2002 (Ist Sitting)(North Zone, Delhi)

349. What particles move around thenucleus of an atom and are nega-tively charged?(1) Electrons (2) Protons(3) Positrons (4) Neutrons(SSC Combined Matric Level (PRE)


350. Among the following, which isalways found in free-state in na-ture?(1) Gold (2) Silver(3) Sodium (4) Copper(SSC Combined Matric Level (PRE)


351. Hardest allotrope of carbon is(1) diamond (2) graphite(3) coke (4) lamp black(SSC Combined Matric Level (PRE)


352. The depletion of ozone layer isdue to(1) chloro fluoro carbon(2) carbon dioxide(3) sulphur dioxide(4) ethane(SSC Combined Matric Level (PRE)


353. Name the particle that is mostessential to continue the chainreaction during the fission ofuranium-(1) Electron (2) Proton(3) Neutron (4) Positron(SSC Combined Matric Level (PRE)


354. Which one amongst the follow-ing is not a Green House gas?(1) Nitrogen(2) Carbon dioxide(3) Carbon Monoxide(4) Chloro fluoro carbons(SSC Combined Matric Level (PRE)


355. In vulcanisation process, rubbercan be hardened by adding(1) Nitrogen (2) Silicon(3) Sulphur (4) Alcohol(SSC Combined Matric Level (PRE)


356. Urea is a(1) Sodium fertilizer(2) Phosphatic fertilizer(3) Nitrogenous fertilizer(4) Potassium fertilizer(SSC Combined Matric Level (PRE)


357. Conversion of chemical energyinto electrical energy occurs in(1) Atomic bombs(2) Dynamo(3) A battery(4) Electric heaters(SSC Combined Matric Level (PRE)


358. The fuel that is used in modernsubmarines is(1) Nuclear fuel (2) Petrol(3) Coal (4) Diesel(SSC Combined Matric Level (PRE)


359. The basic chemical buildingblock of natural rubber obtainedfrom trees is(1) Isoprene (2)Vinyl Chloride(3) Acetylene (4)Neoprene(SSC Combined Matric Level (PRE)

Exam. 05.05.2002 (IInd Sitting)(North Zone, Delhi)

360. The name of plastic polymerfrom which combs, toys, bowlsetc., can be made, is(1) Polyurethane(2) Polystyrene(3) Metallic polysulphides(4) Teflon(SSC Combined Matric Level (PRE)


361. ‘Vinegar’ is a commercial nameof(1) Oxalic acid(2) Hydrochloric acid(3) Acetic acid(4) Citric acid(SSC Combined Matric Level (PRE)


362. Which metal does not undergocorrosion due to the formationof oxide layer?(1) Copper (2) Iron(3) Aluminium (4) Zinc(SSC Combined Matric Level (PRE)


363. Submarines move under water.They have engines that run on(1) Petrol and oxygen(2) Diesel (3) Batteries(4) Steam(SSC Combined Matric Level (PRE)


364. The Bhopal gas tragedy wascaused by the gas(1) Methyl chloride(2) Methyl Iso Cyanide(3) Methyl Iso Cyanate(4) Methyl Cyanide(SSC Combined Matric Level (PRE)




CHEMISTRY

SGAE–772

365. In upper layer of atmosphereozone is formed by(1) the action of ultraviolet rays

on oxygen(2) the combination of oxygen

molecules(3) subjecting oxygen to high

pressure(4) the action of nitrogen on oxy-

gen in atmosphere(SSC Combined Matric Level (PRE)


366. Molasses a by-product in themanufacture of sugar, is con-verted into(1) alcohol (2) paper(3) fuel (4) pulp(SSC Combined Matric Level (PRE)


367. Silver nitrate solution is kept inbrown bottles in laboratory be-cause(1) it reacts with ordinary white

bottles(2) brown bottles stops the pas-

sage of light through it(3) brown bottles do not react

with it(4) brown bottles react with it(SSC Combined Matric Level (PRE)

Exam. 12.05.2002 (Ist Sitting)368. Which of these acids is not or-

ganic in origin?(1) Lactic acid (2) Sulphuric acid(3) Citric acid (4) Oxalic acid(SSC Combined Matric Level (PRE)


369. Lead pencil contains(1) lead(2) ferrous sulphide(3) lead sulphide(4) graphite(SSC Combined Matric Level (PRE)


370. Solder is an alloy of(1) lead, zinc (2) copper, lead(3) tin, lead (4) sodium, lead(SSC Combined Matric Level (PRE)

Exam. 12.05.2002 (Ist Sitting)371. Name two elements that find

wide application in transistor in-dustry(1) Silicon and Germanium(2) Carbon and Platinum(3) Iridium and Germanium(4) Tungsten and Platinum(SSC Combined Matric Level (PRE)


372. The energy of the sun is mainlydue to(1) nuclear fission(2) radioactivity(3) heat(4) nuclear fusion(SSC Combined Matric Level (PRE)


373. Gelatin is mostly used in mak-ing ice–creams in order to(1) prevent making a colloid(2) stabilise the colloid and pre-

vent crystallisation(3) stabilise mixture(4) enrich the aroma(SSC Combined Matric Level (PRE)


374. Which of the following is used toremove ink and rust stains oncloth?(1) Oxalic acid (2) Alcohol(3) Ether (4) Kerosene oil(SSC Combined Matric Level (PRE)


375. Two elements which can form alarge number of compounds are(1) Carbon and Hydrogen(2) Carbon and Nitrogen(3) Carbon and Oxygen(4) Carbon and Sulphur(SSC Combined Matric Level (PRE)


376. An inert gas mixed with oxygengiven to patients suffering fromrestricted breathing is(1) Helium (2) Krypton(3) Radon (4) Argon(SSC Combined Matric Level (PRE)


377. An example of major air pollut-ant is(1) Oxygen

(2) Carbon monoxide(3) Helium(4) Carbon dioxide(SSC Combined Matric Level (PRE)


378. The Fungus which is used in thealcohol industry is(1) Mushroom(2) Candida Aibicans(3) Yeast(4) Rhizopus(SSC Combined Matric Level (PRE)


379. Gold dissolves in(1) Hydrochloric acid(2) Nitric acid(3) Aqua-regia(4) Acetic acid(SSC Combined Matric Level (PRE)


380. Which halide is used in makingsensitive emulsion on photograhicfilm?(1) Sodium chloride(2) Silver bromide(3) Silver iodide(4) Silver chloride(SSC Combined Matric Level (PRE)


381. Among the following the hardestmetal is(1) Gold (2) Iron(3) Platinum (4) Tungsten(SSC Combined Matric Level (PRE)


382. The element used in the manu-facture of safety matches is(1) Phosphorous (2) Magnesium(3) Silicon (4) Sulphur(SSC Combined Matric Level (PRE)


383. The main source of Naphthalene is(1) Charcoal (2) Camphor(3) Coal-tar (4) Diesel(SSC Combined Matric Level (PRE)

Exam. 16.06.2002 (Re-Exam)

384. The material used in solar cellscontains(1) Tin (2) Silicon(3) Caesium (4) Thallium(SSC Combined Matric Level (PRE)

Exam. 16.06.2002 (Re-Exam)

385. Quartz is a crystalline form of(1) Alumina (2) Glass(3) Silica (4) Limestone(SSC Combined Matric Level (PRE)

Exam. 16.06.2002 (Re-Exam)

386. When lime juice is dropped onbaking soda, brisk effervescencetakes place because the gasevolved is(1) Hydrogen (2) Oxygen(3) Carbon dioxide(4) All of them(SSC Combined Matric Level (PRE)

Exam. 16.06.2002 (Re-Exam)

387. Which of the following is a su-per-cooled liquid?(1) Ice-cream (2) Ammonia(3) Glass (4) Wood(SSC Combined Matric Level (PRE)

Exam. 16.06.2002 (Re-Exam)



CHEMISTRY

SGAE–773

388. Which one of the following ele-ments is least likely to be foundin commercial fertilisers?(1) Nitrogen (2) Phosphorous(3) Potassium (4) Silicon(SSC Combined Matric Level (PRE)

Exam. 16.06.2002 (Re-Exam)

389. In the electroplating of gold, theelectrolyte used is(1) Gold chloride(2) Gold nitrate(3) Gold sulphate(4) Potassium aurocyanide(SSC Combined Matric Level (PRE)

Exam. 16.06.2002 (Re-Exam)

390. The acid present in red ants is(1) Acetic acid(2) Butyric acid(3) Caproic acid(4) Formic acid(SSC Combined Matric Level (PRE)

Exam. 16.06.2002 (Re-Exam)

391. The metal extracted from Baux-ite is :(1) Silver (2) Copper(3) Manganese (4) Aluminum

(SSC Combined Matric Level(PRE) Exam.30.07.2006(Ist Sitting (East Zone)

392. pH value between 6.5-7.5 makesthe soil(1) Basic (2) Neutral(3) Acidic (4) None of these


393. The metal chiefly used for galva-nising iron is :(1) Zinc (2) Mercury(3) Cadmium (4) Tin


394. The wire of flash bulb is made of :(1) Copper (2) Barium(3) Magnesium (4) Silver


395. The coloured discharge tubes foradvertisement mainly contain(1) Xenon (2) Argon(3) Helium (4) Neon


396. Muscle fatigue is caused by theaccumulation of :(1) Pyruvic acid(2) Lactic acid(3) Oxalacetic acid(4) Uric acid


397. Baking soda is :(1) Potassium carbonate(2) Sodium hydroxide(3) Sodium carbonate(4) Sodium bicarbonate


398. What is the most common saltin sea water ?(1) Calcium carbonate(2) Potassium chloride(3) Sodium chloride(4) Magnesium sulphate

(SSC Combined Matric Level(PRE) Exam. 30.07.2006

(Ist Sitting (East Zone)

399. When quick lime is added to water(1) heat is liberated(2) heat is absorbed(3) temperature decreases(4) no heat change takes place



400. The number of neutrons presentin an element having mass num-ber 226 and atomic number 88is :(1) 88 (2) 138(3) 314 (4) 50



401. The natural resource, known asblack gold is(1) coal (2) lead(3) tin (4) platinum


(IInd Sitting (Central Zone)

402. This group of alumino-silicateminerals is widely used in mak-ing electrical insulators(1) Bauxite (2) Chromite(3) Manganese (4) Mica



403. Which of the following is a re-newable source of energy ?(1) Coal(2) Geothermal powder(3) Natural gas(4) Uranium


(IInd Sitting (Central Zone)404. The acid which is secreted by

the glands in the stomach wall is(1) sulphuric acid(2) hydrochloric acid(3) nitric acid(4) phosphoric acid


(IInd Sitting (Central Zone)405. Dry ice is

(1) solid ammonia(2) solid sulphur dioxide(3) dry carbon dioxide gas(4) solid carbon dioxide


(IInd Sitting (Central Zone)406. Cement containing excess

amount of lime(1) cracks during setting(2) becomes more strong(3) is slow setting(4) is quick setting


(IInd Sitting (Central Zone)407. Which one of the following is a

micro-element ?(1) Chlorine (2) Hydrogen(3) Nitrogen (4) Oxygen


(IInd Sitting (Central Zone)408. Rock salt is a mineral containing

(1) potassium (2) magnesium(3) sodium (4) iron


(IInd Sitting (Central Zone)409. In a nuclear reactor the material

use for absorbing neutrons is(1) zinc (2) radium(3) lead (4) cadmium


(IInd Sitting (Central Zone)410. Solder metal is an alloy of

(1) lead and tin(2) lead and antimony(3) copper and zinc(4) copper and tin





CHEMISTRY

SGAE–774

411. Ozone depletion in the atmo-sphere is mainly caused by(1) sulphur dioxide(2) nitrogen dioxide(3) hydrogen sulphide(4) chlorofluorocarbon(SSC Combined Matric Level (PRE)


412. Which of the following metals oc-curs in free state ?(1) Copper (2) Iron(3) Zinc (4) Lead(SSC Combined Matric Level (PRE)


413. Copper is refined by(1) roasting (2) oxidation(3) electrolysis (4) zone refining(SSC Combined Matric Level (PRE)


414. Which one of the following is usedas preservative for foodstuff ?(1) Sodium Benzoate(2) Picric acid(3) Glycerine(4) Sodium Chloride(SSC Combined Matric Level (PRE)

Exam. 30.03.2008 (Ist Sitting)415. The element with highest first

ionisation energy is(1) hydrogen (2) helium(3) lithium (4) sodium(SSC Combined Matric Level (PRE)

Exam. 30.03.2008 (Ist Sitting)416. Carbon dioxide is

(1) a reducing agent(2) an oxidising agent(3) a dehydrating agent(4) a bleaching agent(SSC Combined Matric Level (PRE)

Exam. 30.03.2008 (Ist Sitting)417. An atom of an element has atom-

ic number 17 and mass number36. The number of neutrons inits nucleus is(1) 17 (2) 19(3) 36 (4) 53(SSC Combined Matric Level (PRE)

Exam. 30.03.2008 (Ist Sitting)418. Seaweeds are important source

of(1) fluorine (2) chlorine(3) bromine (4) iodine

(SSC Data Entry OperatorExam. 31.08.2008)

419. The resources which can be usedcontinuously, year-after -year arecalled(1) Biotic (2) Abiotic(3) Non-renewable(4) Renewable


420. Refrigerators keep food unspoiledbecause(1) at its low temperature, bac-

teria and moulds are inactive(2) at its low temperature, the

germs are killed(3) at its low temperature, the

germs are frozen(4) it sterilises the food


421. Which of the following elementsis not present in stainless steel?(1) Iron (2) Tungsten(3) Chromium(4) Nickel


422. Select the one which is not amixture :(1) Air (2) Gasoline(3) LPG (4) Distilled water


423. When Hydrogen starts burningin air, it produces ?(1) Ammonia (2) Water(3) Methane (4) Carbonic Acid(SSC Stenographer (Grade 'C' & 'D')

Exam. 26.09.2010)424. Mercury is a :

(1) solid metal(2) liquid metal(3) solid non-metal(4) liquid non-metal(SSC Stenographer (Grade 'C' & 'D')

Exam. 26.09.2010)425. Spirit in contact with body gives

cool sensation because it is :(1) liquid(2) transparent(3) highly volatile(4) a good conductor(SSC Stenographer (Grade 'C' & 'D')

Exam. 26.09.2010)

426. Taj Mahal is greatly affected dueto :(1) Tourists(2) Acid rain(3) Deforestation(4) Sound pollution(SSC Stenographer (Grade 'C' & 'D')

Exam. 26.09.2010)

427. The unit of ionic product of wa-ter (Kw) is :

(1) Mol2 let-1 (2) Mol2 let-2

(3) Mol-1 let-2 (4) Mol-1 let-1

(SSC Higher Secondary Level Data Entry Operator & LDC

Exam. 27.11.2010)

428. The most abundant constituentof atmospheric air is :(1) carbon (2) hydrogen

(3) oxygen (4) nitrogen(SSC Higher Secondary Level Data Entry Operator & LDC

Exam. 27.11.2010)

429- Which mineral is the ore of alu-minium ?

(1) Haematite (2) Bauxite

(3) Magnetite (4) Siderite(SSC Higher Secondary Level Data Entry Operator & LDC

Exam. 27.11.2010)

430. Which gas is used for convert-ing vegetable oils into saturatedfats ?

(1) H2 (2) O2

(3) Cl2 (4) SO2(SSC Higher Secondary Level Data Entry Operator & LDC

Exam. 27.11.2010)

431. Chemical name of bleaching pow-der is :

(1) Calcium chlorate

(2) Calcium hypochlorite

(3) Calcium chloro hypochlorite(4) Calcium bi chloride


Exam. 27.11.2010)

432. Alcoholic (– OH) group can beidentified by :(1) Tollen's Reagent Test

(2) Esterification Test

(3) FeCl3 Test(4) Ozonolysis Reaction


Exam. 27.11.2010)

433. Pollutant from motor car exhaustthat causes mental disease is(1) Lead (2) NO2(3) SO2 (4) Hg

(SSC Higher Secondary LevelData Entry Operator & LDC Exam.

28.11.2010 (Ist Sitting)

434. The total energy of revolving elec-tron in an atom(1) cannot be negative(2) can have any value above

zero(3) can never be positive(4) will always be positive





CHEMISTRY

SGAE–775

435- Conduction band electrons havemore mobility than holes becausethey(1) are lighter(2) experience collision less fre-

quently(3) have negative charge(4) need less energy to move them


28.11.2010 (Ist Sitting)436- The mass number of a nucleus is

(1) always less than its atomicnumber

(2) always more than its atomicnumber

(3) always equal to its atomicnumber

(4) sometimes more and som-times equal to its atomic num-ber


28.11.2010 (Ist Sitting)437. Iodine can be separated from a

mixture of Iodine and PotassiumChloride by(1) sedimentation(2) filtration(3) sublimation(4) distillation


28.11.2010 (Ist Sitting)438. Identify the metal which is non

toxic in nature.(1) Chromium(2) Gold(3) Cadmium (4) Cobalt


28.11.2010 (Ist Sitting)439. The gas that usually causes ex-

plosions in coal mines is(1) Hydrogen(2) Carbon monoxide(3) Air (4) Methane


28.11.2010 (Ist Sitting)440. The chemical bahaviour of an

atom depends upon(1) the number of protons in its

nucleus(2) the number of neutrons in

the nucleus(3) the number of electrons or-

biting around the nucleus(4) the number of nucleons in

the nucleus(SSC Higher Secondary Level

Data Entry Operator & LDC Exam.28.11.2010 (Ist Sitting)

441- A powerful eye irritant presentin smog is(1) nitric oxide(2) sulphur dioxide(3) peroxyacetyl nitrate(4) carbon dioxide



442. The most important ore of lead is(1) Galena (2) Magnetite(3) Pyrolusite (4) Siderite



443. When water itself combineschemically with some element ormineral it is called(1) Carbonation (2) Desilication(3) Hydration (4) Oxidation

(SSC Higher Secondary LevelData Entry Operator & LDC


444. The electronic configuration of anatom having atomic number‘20’ is(1) 2, 8, 10 (2) 2, 6, 8, 4(3) 2, 8, 8, 2 (4) 2, 10, 8



445. The most reactive among thehalogens is(1) Fluorine (2) Chlorine(3) Bromine (4) Iodine



446. The major component in the LPGis(1) methane (2) butane(3) ethane (4) propane



447. KMnO4 can be used as a/an(1) insecticide(2) fertiliser(3) pesticide (4) disinfectant



448. Electrolysis of an aqueous solu-tion of copper sulphate usingcopper electrodes gives(1) Copper at cathode and oxy-

gen at anode.(2) Copper at anode and oxygen

at cathode.

(3) Copper at cathode and an-odes dissolve to give copper.

(4) Hydrogen at cathode and oxy-gen at anode.

(SSC Stenographer (Grade 'C' & 'D')

Exam. 09.01.2011)

449. Which of the inert gases can formcompounds?(1) Helium (2) Xenon(3) Krypton (4) Argon(SSC Stenographer (Grade 'C' & 'D')

Exam. 09.01.2011)

450. Burning pyrites ore gives out(1) Carbon dioxide gas(2) Sulphur dioxide gas(3) Nitrogen dioxide gas(4) Nitric oxide gas(SSC Stenographer (Grade 'C' & 'D')

Exam. 09.01.2011)

451. Oxygen has (+) oxidation num-ber only in(1) OF2 (2) Cl2O(3) H2O (2) N2O(SSC Stenographer (Grade 'C' & 'D')

Exam. 09.01.2011)

452. Which one of the following ele-ments is used in the manufac-ture of fertilizers ?(1) Fluorine (2) Potassium(3) Lead (4) Aluminium

(SSC Multi-Tasking (Non-Technical)Staff Exam.20.02.2011)

453. Natural rubber is the polymerof :(1) Isoprene (2) Styrene(3) Butadiene (4) Ethylene

(SSC Multi-Tasking (Non-Technical)Staff Exam. 20.02.2011)

454. In addition to hydrogen, the oth-er abundant element present onSun’s surface is(1) Helium (2) Neon(3) Argon (4) Oxygen


455. Which of the following is the ma-jor constituent of LPG?(1) Methane (2) Ethane(3) Propane (4) Butane


456. Ozone layer is present in(1) Troposphere(2) Ionosphere(3) Stratosphere(4) Exosphere




CHEMISTRY

SGAE–776

457. An electric iron has a heatingelement made of :(1) Copper (2) Tungsten

(3) Nichrome (4) Zinc(SSC Multi-Tasking (Non-Technical)

Staff Exam. 27.02.2011)

458. The process of covering waterpipes made of Iron with Zinc layerto prevent corrosion is called :(1) Zinc plating(2) Alloy formation(3) Vulcanization(4) Galvanization


459. The particle required to continuethe chain process of Uraniumfission is :(1) Electron (2) Proton

(3) Neutron (4) Positron(SSC Multi-Tasking (Non-Technical)

Staff Exam. 27.02.2011)

460. Which of the following is used toincrease the anti-knockingproperty of petrol ?(1) Tetramethyl lead(2) Tetraethyl lead(3) Trimethyl lead(4) Triethyl lead


461. The chief source for the productionof nitrogeneous fertilizers is :(1) Ammonia(2) Nitric acid(3) Nitrogen(4) Nitrogen dioxide

(SSC Multi-Tasking (Non-Technical)

Staff Exam. 27.02.2011)

462. The element used for making so-lar cells is(1) Magnesium (2) Sodium(3) Calcium (4) Silicon

(SSC CISF Constable (GD)Exam. 05.06.2011)

463. Which of the following is an ironore ?(1) Bauxite (2) Magnetite(3) Lignite (4) Nitrite

(SSC Stenographer Grade 'C' & 'D'Exam. 16.10.2011)

464. Which one of the following is anexample of a gel ?(1) Cheese(2) Milk(3) Face cream(4) Shaving cream


465. Bakelite is a copolymer of Phe-nol and(1) Formaldehyde(2) Acetaldehyde(3) Benzaldehyde(4) Cinnaldehyde


466. When a spoon is to be electro-plated with nickel the spoon is(1) dipped in a nickel sulphate

solution(2) made anode and a pure nickel

rod, the cathode(3) made cathode and a pure

nickel red, the anode(4) coated with nickel sulphate

and dried(SSC Stenographer Grade 'C' & 'D'

Exam. Held on : 16.10.2011)467. The Bhopal tragedy was caused

by the gas(1) phosgene(2) carbon monoxide(3) methyl isocyanate(4) chlorine


468. Which one of the following con-tributes largely to the ‘greenhouse effect’ ?(1) Ozone(2) Carbon monoxide(3) Carbon dioxide(4) Water vapour


469. The gas used to dilute oxygen forbreathing by deep sea divers is:(1) Neon (2) Argon(3) Nitrogen (4) Helium

(SSC (10+2) Level Data EntryOperator & LCD Exam. 04.12.2011

(Ist Sitting (North Zone)470. Bleaching powder is prepared

by passing :(1) Chlorine over slaked lime(2) Oxygen over slaked lime(3) Carbon dioxide over slaked

lime(4) Chlorine over quick lirne


(Ist Sitting (North Zone)471. Gas released during Bhopal trag-

edy was :(1) Sodium isothiocyanate(2) Potassium isothiocyanate(3) Ethyl isothiocyanate(4) Methyl isothiocyanate


(Ist Sitting (North Zone)

472. Which of the following state-ments are correct about chloro-form?a. Liquid fuelb. Anaesthetic in naturec. Produces phosgened. Fire extinguisher(1) a, b (2) a, c(3) b, c (4) d, a


(Ist Sitting (North Zone)

473. Which of the following is not amethod of preparing oxygen?(1) Electrolysis of water(2) Fractional distillation of liq-

uid air(3) Decomposition of potassium

permanganate(4) Decomposition of manganese

dioxide(SSC (10+2) Level Data Entry

Operator & LCD Exam. 04.12.2011(IInd Sitting (North Zone)

474. Which one of the following is nota characteristic feature of alloys?They are(1) Compounds(2) Mixtures(3) Solutions(4) Homogeneous systems


(IInd Sitting (North Zone)

475. Permanent – hardness of watermay be removed by addition of(1) Alum(2) Sodium carbonate(3) Lime(4) Potassium Permangante



476. Of the following, which one pol-lutes the air of a big city ?(1) Copper (2) Chromium(3) Lead (4) Cadmium



477. Wood spirit is(1) Methyl alcohol(2) Ethyl alcohol(3) Butyl alcohol(4) Propyl alcohol





CHEMISTRY

SGAE–777

478. Which of the following process-es is used for the production ofBiodiesel ?(1) Transamination(2) Transcription(3) Transesterification(4) Translation


(Ist Sitting (East Zone)479. One property of ammonia is

(1) It is insoluble in water(2) It is a odourless gas(3) It is a yellowish gas(4) Its aqueous solution turns

red litmus blue(SSC (10+2) Level Data Entry

Operator & LCD Exam. 04.12.2011(Ist Sitting (East Zone)

480. Find the odd one:(1) Marble (2) Chalk(3) Limestone (4) Slaked lime


(Ist Sitting (East Zone)481. Of the following which one pol-

lutes the air of a big city ?(1) Copper (2) Chromium(3) Lead (4) Calcium


(Ist Sitting (East Zone)482. “Fire-fighting clothes” are made

from(1) Mica (2) Asbestos(3) Talc (4) Steatite


(IInd Sitting (East Zone)483. Water gas is the mixture of

(1) carbon dioxide and hydrogen(2) carbon monoxide and nitrogen(3) carbon monoxide and hydro-

gen(4) carbon dioxide and nitrogen


(IInd Sitting (East Zone)484. Brass is made of

(1) copper and tin(2) tin and lead(3) copper and zinc(4) copper, tin and zinc


(IInd Sitting (East Zone)

485. Which of the following causes therusting of iron?a. Oxidationb. Reductionc. Chemical reaction with oxy-

gen

d. Chemical reaction with CO2

(1) a and b (2) b and c(3) c and d (4) a and c



486. Which type of fire extinguisheris used for petroleum fire ?(1) Foam type(2) Soda acid type(3) Powder type(4) None of these



487. The function of skimming tankin sewage treatment is to remove(1) oil and fatty substances(2) suspended solids(3) gritty substances(4) inorganic substances



488. Which one of the following is nota ‘green house gas’ ?(1) Chlorofluorocarbons(2) Methane(3) Carbon dioxide(4) Nitrogen



489. Black lung disease occurs inpeople working in(1) Electroplating industry(2) Organic solvents industry(3) Paint manufacturing indus-

try(4) Coal mines



490. Which one of the following isknown as the ‘brown coal’ ?(1) Anthracite(2) Bituminous(3) Coke(4) Lignite


(Ist Sitting (Delhi Zone)491. The chief source of naphthalene

is(1) Coal-tar (2) Diesel

(3) Charcoal (4) Camphor(SSC (10+2) Level Data Entry

Operator & LCD Exam. 11.12.2011(Ist Sitting (Delhi Zone)

492. Why is water not suitable for put-ting out a petrol fire ?(1) The oxygen content of water

is isolated by petrol and thusit helps in burning

(2) Petrol is too inflammable to beextinguished by water

(3) The heat required for combus-tion of petrol is very low

(4) Water, being heavy, slipsbelow petrol which thus re-mains in contact with air andburns


(Ist Sitting (Delhi Zone)

493. Milk is(1) Emulsion (2) Suspension(3) Foam (4) Gel

(SSC (10+2) Level Data EntryOperator & LCD Exam. 11.12.2011 (IstSitting (Delhi Zone & SSC (10+2) Level

Data Entry Operator & LCD Exam.11.12.2011 (Ist Sitting (East Zone))

494. The chemical substance presentin bones and teeth is(1) Calcium phosphate(2) Calcium chloride(3) Calcium sulphate

(4) Calcium borate(SSC (10+2) Level Data Entry


495. Maximum permissible concen-tration of copper in drinkingwater in mg/L is(1) 0.01 (2) 0.05

(3) 1.0 (4) 2.0(SSC (10+2) Level Data Entry


496. If lime water is kept in the air, itturns milky due to presence of :(1) Carbondioxide(2) Nitrogen(3) Oxygen(4) Sulphurdioxide


(IInd Sitting (Delhi Zone)

497. Heavy metal pollution of wateris caused by:(1) Paints(2) Wood burning(3) Acid Plants(4) Domestic sewage


(IInd Sitting (Delhi Zone)



CHEMISTRY

SGAE–778

498. The inert gas which is substitutedfor nitrogen in the air used bydeep sea divers for Breathing is:(1) Neon (2) Argon

(3) Krypton (4) Helium(SSC (10+2) Level Data Entry

Operator & LCD Exam. 11.12.2011(IInd Sitting (Delhi Zone)

499. Asbestos is formed of :(1) Calcium and Magnesium(2) Copper, Zinc and Manga-

nese(3) Lead and Iron(4) Calcium and Zinc


(IInd Sitting (Delhi Zone)500. Why is water not suitable for

putting out a petrol fire ?(1) The oxygen content of water

is isolated by petrol and thusit helps in burning

(2) Petrol is too inflammable tobe extinguished by water

(3) The heat required for com-bustion of petrol is very low

(4) Water, being heavy, slipsbelow petrol which thusremains in contact with air

and burns(SSC (10+2) Level Data Entry


501. Brine refers to :(1) Salt water (2) Sweet water(3) Pure water (4) Starch water

(SSC Multi-Tasking (Non-Tech.)Staff Exam. 16.02.2014)

502. The chemical substance presentin bones and teeth is(1) Calcium phosphate(2) Calcium chloride(3) Calcium sulphate

(4) Calcium borate(SSC (10+2) Level Data Entry


503. Maximum permissible concen-tration of copper in drinkingwater in mg/L is(1) 0.01 (2) 0.05(3) 1.0 (4) 2.0


(Ist Sitting (East Zone)504. Which one of the following is

known as the ‘brown coal’ ?(1) Anthracite (2) Bituminous

(3) Coke (4) Lignite(SSC (10+2) Level Data Entry


505. The chief source of naphthaleneis(1) Coal-tar (2) Diesel

(3) Charcoal (4) Camphor(SSC (10+2) Level Data Entry


506. Which of the following is the bestfuel in terms of energy releasedper gram of fuel?(1) Hydrogen (2) Methane

(3) Ethanol (4) Butane(SSC (10+2) Level Data Entry

Operator & LCD Exam. 11.12.2011(IInd Sitting (East Zone)

507. One carat of diamond is equal to(1) 100 mg (2) 150 mg

(3) 200 mg (4) 250 mg(SSC (10+2) Level Data Entry

Operator & LCD Exam. 11.12.2011(IInd Sitting (East Zone)

508. Iron is extracted from(1) Cinnabar (2) Haematite

(3) Bauxite (4) Dolomite(SSC Constable (GD) & Rifleman (GD)

Exam. 22.04.1912 (Ist Sitting)509. Which of the following imparts a

blue colour to glass ?(1) Cabalt oxide(2) Copper oxide(3) Iron oxide(4) Nickel oxide

(SSC Constable (GD) & Rifleman (GD)Exam. 22.04.1912 (Ist Sitting)

510. A matured mammalian cell with-out nucleus is(1) Lymphocyte(2) Erythrocyte(3) Spermatozoan(4) Oocyte

(SSC Constable (GD) & Rifleman (GD)Exam. 22.04.1912 (IInd Sitting)

511. The most common cause of pol-lution of air is(1) Carbon dioxide(2) Carbon monoxide(3) Sulphur dioxide(4) Smoke


512. The process by which milk isconverted to curd is called(1) Pasteurization(2) Vernalization(3) Fermentation(4) Retting


513. The technique of calculating theage of fossil organisms is(1) Radiocarbon dating(2) Electroporation(3) Counting the annual rings(4) Micromanipulation


514. Nitrogen forms a variety of com-pounds in all oxidation statesranging from(1) –3 to + 5 (2) –3 to + 3(3) –3 to + 4 (4) –3 to + 6


515. The next higher homologue ofC6H14 is(1) C7H14 (2) C7H12

(3) C6H12 (4) C7H16(SSC Constable (GD) & Rifleman (GD)

Exam. 22.04.1912 (IInd Sitting)516. Which of the following is used

as a moderator in nuclear reac-tors ?(1) Thorium(2) Graphite(3) Ordinary water(4) Radium

(SSC (10+2) Level Data EntryOperator & LDC Exam. 21.10.2012

(1st Sitting))517. Sodium vapour lamps glow with

yellow colour. This is due to(1) sublimation of sodium to emit

yellow colour(2) the emission of excess ener-

gy absorbed by sodium at-oms, in the yellow region ofthe spectrum

(3) the low ionisation energy ofsodium

(4) its ability to absorb all othercolours except yellow


(1st Sitting))518. Philosopher’s wool is chemically

(1) Aluminium oxide(2) Magnesium oxide(3) Zinc oxide(4) Calcium oxide


(1st Sitting))519. Charcoal is used in water treat-

ment as a/an(1) absorbent (2) coagulant(3) solvent (4) adsorbent


(1st Sitting))



CHEMISTRY

SGAE–779

520. The gas involved in Bhopal inci-dent was(1) Hydrogen sulphide(2) Nitrogen dioxide(3) Methyl chloride(4) Methyl isocyanide


(1st Sitting))521. Alcohol prepared by the distilla-

tion of wood is :(1) Propyl alcohol(2) Methyl alcohol(3) Ethyl alcohol(4) Glycerolx


(2nd Sitting))522. Substance used as an anti -

freeze in radiators of automobilesis :(1) Methyl alcohol and H2O(2) Methyl alcohol(3) Ethyl alcohol(4) Ethyl alcohol and H2O


(2nd Sitting))523. The function of sedimentation

tank in sewage treatment is to:(1) Disinfect the sewage(2) Remove water content(3) Aerate the sewage(4) Remove suspended solids


(2nd Sitting))524. The two metal ions that cause

hardness to water are:(1) Calcium, Magnesium(2) Sodium, Calcium(3) Sodium, Potassium(4) Sodium, Magnesium


(2nd Sitting)525. The liquid waste from kitchens

and baths, of residences isknown as :(1) Domestic sewage(2) Storm water(3) Sullage (4) Refuse


(2nd Sitting)526. The lightest radioactive element is

(1) deuterium (2) polonium(3) tritium (4) uranium


(1st Sitting)

527. The chemical used in develop-ing photographic films is(1) silver bromide(2) hypo(3) sodium sulphate(4) hydroquinone


(1st Sitting)528. A mixture of water and alcohol

can be separated by(1) Filtration (2) Evaporation(3) Decantation (4) Distillation


(1st Sitting)

529. Acid rain is caused due to pollu-tion of atmosphere by(1) oxides of carbon and nitro-

gen(2) oxides of nitrogen and sul-

phur(3) oxides of nitrogen and phos-

phorous(4) None of these


(1st Sitting)

530. Which of the following is biode-gradable ?(1) Paper (2) D.D.T.(3) Aluminium (4) Plastic


(1st Sitting)

531. The ‘Green House effect’ is pro-duced due to the presence ofexcess amount of(1) Sulphur dioxide(2) Nitrogen dioxide(3) Carbon monoxide(4) Methane


(1st Sitting)

532. An element that does not occurin nature but can be producedartificially is(1) thorium (2) radium(3) plutonium (4) uranium


(1st Sitting)

533. Chloroform can be used as(1) Analgesic (2) Anaesthetic(3) Antimalarial(4) Antibiotic


(1st Sitting)

534. The manufacture of iron fromiron ore involves the process of(1) oxidation(2) reduction(3) fractional distillation(4) electrolysis


(1st Sitting)535. Which of the following is caused

by the higher concentration ofNitrogen and Phosphorous ?(1) Eutrophication(2) Hardness(3) Alkalinity(4) Acidity


(1st Sitting)536. Earth’s atmosphere is an enve-

lope of gases extending to aheight of(1) 100 km (2) 150 km(3) 200 km (4) 300 km


(1st Sitting)537. In its reaction with silver nitrate,

C2H2 shows(1) Oxidising property(2) Reducing property(3) Basic property(4) Acidic property


(2nd Sitting)538. The main source of carbon mon-

oxide is(1) Industrial process(2) Fuel combustion(3) Transportation(4) Solid waste disposal


(2nd Sitting)539. ‘Aerosol’ is

(1) Suspended solid particles in air(2) Pollutant gas, present in air(3) Microbes, present in air(4) Green house gas present in

air(SSC (10+2) Level Data Entry

Operator & LDC Exam. 04.11.2012(2nd Sitting)

540. Philosopher’s Wool is(1) Zinc carbonate(2) Zinc sulphate(3) Zinc oxide(4) Zinc blende


(2nd Sitting)



CHEMISTRY

SGAE–780

541. Synthetic detergents are madefrom(1) Sodium stearate(2) Sodium salt of benzene sul-

phonic acid(3) Sodium salt of benzene car-

boxylic acid

(4) Sodium palmitate(SSC (10+2) Level Data Entry

Operator & LDC Exam. 04.11.2012

(2nd Sitting)

542. The sewage obtained from waterclosets and urinals is known as(1) Sanitary waste(2) Industrial waste(3) Garbage (4) Sullage


(2nd Sitting)

543. Maximum permissible concentra-tion of total hardness in drink-ing water is(1) 50 (2) 100(3) 200 (4) 500


(2nd Sitting)

544. Electric fuse is an alloy of(1) tin and lead(2) zinc and lead(3) copper and iron(4) carbon and tin

(SSC Graduate Level Tier-I

Exam. 11.11.2012 (1st Sitting)

545. The chemical used for cloudseeding for artificial rains is(1) Silver Nitrate(2) Potassium Bromide(3) Silver Iodide(4) Potassium Nitrate



546. Which among the following is liq-uid non-metal ?(1) Mercury (2) Bromine(3) Water (4) Alcohol



547. In silvery paints, the main con-stituent present is(1) Aluminium powder(2) Silver powder(3) Lead powder(4) White lead



548. Which one of the following is agreenhouse gas ?(1) Nitrogen(2) Helium(3) Carbon dioxide(4) Sulphur dioxide


Exam. 11.11.2012 (1st Sitting)549. Which of the following is a

method/process of disposing ofsolid waste which cannot be re-used or recycled ?(1) Landfills(2) Incineration(3) Pyrolysis and Gasification(4) All the above

(SSC Graduate Level Tier-IExam. 11.11.2012 (1st Sitting)

550. Laughing gas is(1) Nitric oxide(2) Nitrous oxide(3) Nitrogen trioxide(4) Nitrogen pentoxide

(SSC FCI Assistant Grade-IIIExam. 11.11.2012 (2nd Sitting)

551. Ozone layer in the upper partsof the atmosphere serves as aprotective shield against harmful(1) solar ultraviolet radiation(2) solar infrared radiation(3) CO2 in the air(4) SO2 in the air

(SSC FCI Assistant Grade-IIIExam. 11.11.2012 (2nd Sitting)

552. Which of the following is colour-less ?(1) Chlorine (2) Oxygen(3) Phosphorus (4) Sulphur

(SSC Delhi Police Sub-Inspector(SI) Exam. 19.08.2012)

553. Hard water and soft water canbe distinguished by using(1) dilute acid(2) ordinary soap(3) detergent(4) liquid soap


554. Water cycle refers to(1) an integrated attempt to re-

cycle water in relatively aridregions

(2) constant movement of waterfrom ocean to land and backto ocean once again

(3) scientific management of wa-ter in areas excessivelyplagued with water-logging

(4) water distribution in relativelydry areas(SSC Delhi Police Sub-Inspector

(SI) Exam. 19.08.2012)

555. Ferrous sulphate is used in wa-ter treatment as a/an(1) Oxidizing agent(2) Reducing agent(3) Coagulant aid(4) Adsorbent


556. Hardness of the water is com-monly measured in terms of(1) Calcium carbonate equiva-

lents(2) Calcium sulphate equivalents(3) Magnesium carbonate equiv-

alents(4) Magnesium sulphate equiva-

lents(SSC Delhi Police Sub-Inspector

(SI) Exam. 19.08.2012)557. The unit to measure the flow of

water is(1) Micro Mho (2) Ohm meter

(3) Milli curie (4) Cusecs(SSC Multi-Tasking Staff Exam.10.03.2013, Ist Sitting : Patna)

558. Surface water is a better sourceof drinking water because it ispoor in

(1) Dust (2) Bacteria(3) Arsenic (4) Algae

(SSC Multi-Tasking Staff Exam.10.03.2013, Ist Sitting : Patna)

559. The enormous amount of energy re-leased in an explosion of an atmoicbomb is due to the(1) conversion of mass into energy(2) conversion of chemical ener-

gy into heat energy(3) conversion of mechnical en-

ergy into nuclear energy(4) conversion of neutrons into

protons(SSC Multi-Tasking Staff Exam.10.03.2013, Ist Sitting : Patna)

560. The oxidation number of nickelin K4[Ni(CN)4] is(1) Zero (2) +4(3) –4 (4) +8


561. The rusting of iron is a/an(1) physical change(2) electrochemical change(3) electrical change(4) None of the above




CHEMISTRY

SGAE–781

562. Sulphur dioxide level in the at-mosphere can be reduced byusing(1) more efficient car engines(2) catalytic converters in industry(3) static electricity to attract it

in factory chimneys(4) low - sulphur fuels


563. When a lead storage battery isdischarged,(1) SO2 is evolved(2) Lead sulphate is consumed(3) Lead is formed(4) Sulphuric acid is consumed


564. Benzene cannot undergo :(1) Substitution (2) Addition(3) Elimination (4) Oxidation

(SSC Multi-Tasking StaffExam. 10.03.2013)

565. Which among the following isfound in chlorophyll ?(1) Ca2+ (2) Mg2+

(3) Fe2+ (4) Al3+


566. The polymer obtained by the con-densation of hexamethylene di-amine and adipic acid is :(1) Nylon 66 (2) Terylene(3) Tollen’s (4) Bakelite


567. Radioactive elements emit :(1) Radiowaves(2) Infrared waves(3) Ultraviolet waves(4) a, b and g radiations


568. Which one out of the following helpsin burning ?(1) Oxygen(2) Carbon monoxide(3) Nitrogen(4) Carbon dioxide

(SSC Multi-Tasking StaffExam. 17.03.2013, Ist Sitting)

569. In organic compounds, nitrogen isestimated by(1) Carius method(2) Victor-Meyer’s method(3) Liebig’s method(4) Dumas’ method


570. The hottest part of the gas flame isknown as(1) blue zone(2) non-luminous zone(3) luminous zone(4) dark zone


571. Silicon is a(1) Semiconductor(2) Insulator(3) Nonconductor(4) Conductor

(SSC Multi-Tasking StaffExam. 17.03.2013, IInd Sitting)

572. The orientation of an atomic or-bital is governed by(1) principal quantum number(2) magnetic quantum number(3) spin quantum number(4) azimuthal quantum number


573. The percentage of oxygen in airis approximately(1) 100% (2) 1%(3) 78% (4) 21%


574. What is the second largest com-ponent in milk ?(1) Fat (2) Minerals(3) Water (4) Sugar


575. Bayer’s reagent is(1) Alkaline potassium perman-

ganate(2) Acidified potassium perman-

ganate(3) Hydrogen peroxide(4) Bromine water

(SSC Multi-Tasking Staff Exam.17.03.2013, Kolkata Region)

576. The value of Avogadro Number is(1) 6.023 × 1022

(2) 6.023 × 1023

(3) 6.023 × 1024

(4) 6.023 × 1025


577. Choose the incorrect statementpertaining to organic compounds(1) They have low melting and

boiling points(2) They do not dissolve in wa-

ter(3) They are not easily combus-

tible(4) They contain mainly carbon

and hydrogen(SSC Multi-Tasking Staff Exam.

17.03.2013, Kolkata Region)

578. The weight of 6.023 × 1022 at-oms of carbon is(1) 12 gms (2) 120 gms(3) 1.2 gms (4) 0.12 gms


579. If the sewage is fully oxidized,the nitrogen is in the form of(1) Nitrites (2) Ammonia(3) Nitramines (4) Nitrates


580. Suspension particles have thesize between(1) 10–2 and 10–4 cm(2) 10–5 and 10–7cm(3) 10–8 and l0-10 cm(4) 10–1 and 10–2 cm


581. Iodine value is used to estimate(1) Hydroxyl groups in oil(2) Alkali content in oil(3) Unsaturation in oil(4) Carboxylic groups in oil


582. Element 106 was discovered by(1) Rutherford (2) Seaborg(3) Lawrence (4) Kurchatove


583. The value of gas constant R inErgs deg–1 mole–1 is(1) 8.314 × 107 (2) 8.341 × 107

(3) 8.413 × 107 (4) 4.183 × 107


584. Which of the following metals isused in Space Crafts to withstandhigh temperatures ?(1) Fe (2) Ti(3) Ni (4) Pb

(SSC Graduate Level Tier-IExam. 21.04.2013, Ist Sitting)

585. Brass gets discoloured in air dueto constant exposure in presenceof:(1) Aluminium phosphide(2) Hydrogen sulphide(3) Hydrogenated wafers(4) Aluminium sulphide




CHEMISTRY

SGAE–782

586. The fat of a common mussel-se-cretes a sticky glue that can beused to make heart implants. Theunique chemical compoundpresent in the glue is:(1) Amino phenyl alanine(2) Hydroxy phenyl alanine(3) Phenyl alanine(4) Dihydroxy phenyl alanine


587. Nitrogen is an essential constitu-ent of all :(1) Fats (2) Proteins(3) Vitamins (4) Carbohydrates


588. Rutherford’s scattering experi-ment proved the presence of(1) atoms in all matter(2) electrons in atoms(3) neutrons in atoms(4) nucleus in atoms

(SSC Graduate Level Tier-IExam. 21.04.2013, IInd Sitting)

589. When a metal is heated in aflame, the electrons absorb en-ergy and jump to higher energystate. On coming back to the low-er energy siate, they emit light,which we can observe in(1) Raman spectra(2) Absorption spectra(3) Emission spectra(4) Fluorescence


590. “Bhopal gas tragedy” 1984 is re-lated to(1) Aluminium Phosphide(2) Methyl bromide(3) Methyl isocyanate(4) Carbon dioxide


591. The percentage of nitrogen presentin ammonium sulphate is :(1) 27% (2) 25%(3) 30.5% (4) 18%

(SSC Graduate Level Tier-IExam. 21.04.2013)

592. Ethanol containing 5% water isknown as :(1) Dilute alcohol(2) Power alcohol(3) Rectified spirit(4) Absolute alcohol


593. Stains of rust on clothes can beremoved by :(1) Oxalic acid (2) Petrol(3) Alcohol (4) H2O2


594. Which one of the following hasgreatest mass ?(1) electron (2) proton(3) neutron(4) hydrogen nucleus


595. A colloidal system in which a liq-uid is dispersed in a liquid iscalled(1) gel (2) emulsion(3) sol (4) precipitate


596. The antiseptic compound presentin dettol is(1) Iodine (2) Enloroxylenol(3) Biothional (4) Cresol


597. Piped Natural Gas (PNG) is usedfor(1) Mining (2) Welding(3) Anaesthesia (4) Cooking


598. Which metal is the heaviest inperiodic table among the follow-ing ?(1) Os (2) Pt(3) Pb (4) W

(SSC Constable (GD)Exam. 12.05.2013, Ist Sitting)

599. The chemical formula of thelaughing gas is(1) NO (2) N2O(3) NO2 (4) N2O3

(SSC Constable (GD)Exam. 12.05.2013, Ist Sitting)

600. The important metal used withiron to produce stainless steel is(1) Aluminium (2) Chromium(3) Tin (4) Carbon

(SSC Constable (GD)Exam. 12.05.2013)

601. The name of unreactive gas is(1) Carbon dioxide(2) Hydrogen(3) Nitrogen(4) Oxygen


602. Heavy water is so called becauseit contains(1) Heavy isotope of hydrogen(2) Heavy isotope of oxygen(3) Mole number of hydrogen at-

oms(4) Mole number of oxygen atoms


603. Glass is soluble in(1) H2SO4 (2) HClO4

(3) HNO3

(4) HF(SSC Constable (GD)

Exam. 12.05.2013)604. Acid rain is caused by

(1) SO2 and particulates(2) NO2 and particulates(3) CO2 and CFCs(4) SO2 and NO2


605. The nuclear particle having nomass and no charge, but onlyspin is(1) proton (2) neutrino(3) meson (4) electron


606. In a period from Li to F, ionisa-tion potential(1) cannot be predicted(2) increases(3) decreases(4) remains same


607. Which of the following metals candeposit copper from copper sul-phate solution ?(1) Platinum (2) Mercury(3) Iron (4) Gold


608. When Arsenic atoms are addedto Germanium lattice, it becomesa/an(1) Insulator(2) Superconductor(3) Intrinsic semiconductor(4) Extrinsic semiconductor


609. Which among the following isused to dilute oxygen in the gascylinders used by divers ?(1) Krypton (2) Argon(3) Helium (4) Neon




CHEMISTRY

SGAE–783

610. Which one of the following doesnot form oxyacid ?(1) Sulphur (2) Chlorine(3) Nitrogen (4) Fluorine


611. Exposure to mixtures of chemi-cals are greater than expectedon the basis of effects of expo-sure to each chemical individu-ally. This is known as(1) Additives (2) Antagonism(3) Synergism (4) Independent


612. The filter over which sewage issprinkled is called as(1) Trickling filter(2) Percolating filter(3) Contact bed(4) Intermittent sand filter


613. Neutrons are slowed down in anuclear reactor by(1) Fissionable material(2) Moderator(3) Control rods(4) Cooling system


614. An element of atomic no. 29 be-longs to(1) s-block (2) d-block(3) p-block (4) f-block


615. Which among the following isused as a catalyst in the produc-tion of high octane fuels?(1) HNO3 (2)H2SO4(3) HCl (4) HF


616. The effect or response producedby two or more chemicals areless than the sum of the effectsor response that the chemicalwould produce individually isknown as(1) Antagonism(2) Independent(3) Additive(4) Synergism


617. Threshold limit value of copperin the atmospheric air is(1) 0.001 mg/m3

(2) 0.01 mg/m3

(3) 1.0 mg/m3

(4) 5.0 mg/m3


618. Silicone is a polymer of(1) Tetraalkyl silane(2) Silicon tetrachloride(3) Dialkyl dichloro silane(4) Silane


619. Which is a natural colloid ?(1) Sodium chloride(2) Urea(3) Cane-sugar(4) Blood


620. Which one of the following doesnot contain Silver ?(1) Ruby Silver(2) Lunar Caustic(3) German Silver(4) Horn Silver


621. The presence of Cobalt in Vita-min B12 was established for thefirst time by(1) Hydrolysis test(2) Spectroscopy(3) Borax-Bead test(4) Sodium Nitroprusside test


622. Coating of solid waste with im-pervious material is known as(1) Encapsulation(2) Chemical fixation(3) Landfill(4) Capping


623. Ultraviolet rays can be used inwater treatment as(1) Flocculator (2) Precipitator(3) Hydrolyser (4) Disinfectant


624. The heaviest naturally occurringelement is:(1) Mercury (2) Polonium(3) Thorium (4) Uranium

(SSC CAPFs SI & CISF ASIExam. 23.06.2013)

625. Sulphur dioxide bleaches colour-ing matter by :(1) Reduction(2) Dehydration(3) Decomposition(4) Oxidation


626. Which of the following elementsis not radio-active ?(1) Radium (2) Plutonium(3) Zirconium (4) Uranium


627. Gypsum is used for improvementof:(1) Alkaline soils (2) Saline soils(3) Podsols (4) Acidic soils


628. Spontaneous change is one inthere is:(1) A lowering of entropy(2) A lowering of free energy(3) Increase in free energy(4) An increase in Internal energy


629. Heating of a ore below its melt-ing point in the absence of air isknown as(1) Refining (2) Calcination(3) Roasting (4) Smelting

(SSC (10+2) Level Data EntryOperator & LDC Exam. 20.10.2013)

630. The most electronegative elementamong the following is(1) Fluorine (2) Sodium(3) Chlorine (4) Oxygen


631. Mark the compound which pos-sesses ionic, covalent and co-ordinate bonds.(1) NH4Cl (2) SO3

(3) SO2 (4) H2O(SSC (10+2) Level Data Entry

Operator & LDC Exam. 20.10.2013)632. The depletion of Ozone layer is

mainly due to(1) Volcanic eruptions(2) Aviation fuels(3) Radioactive rays(4) Chlorofluorocarbons


633. A nibble is equal to_____ bits.(1) 32 (2) 4(3) 8 (4) 16


634. The non-metal found in the liq-uid state is(1) bromine (2) nitrogen(3) fluorine (4) chlorine




CHEMISTRY

SGAE–784

635. Ionisation energy of nitrogen isgreater than that of oxygen be-cause nitrogen has(1) high bond dissociation energy(2) smaller atomic radius(3) stable half filled 2p sub level(4) high nuclear charge


636. Sulphuric acid is(1) monobasic (2) dibasic(3) tribasic (4) tetrabasic


637. Which one of the following groupof gases contribute to the “GreenHouse Effect”?(1) Carbon dioxide and Methane(2) Ammonia and Ozone(3) Carbon monoxide and Sulphur

dioxide(4) Carbon tetraflouride and Ni-

trous oxide(SSC (10+2) Level Data Entry

Operator & LDC Exam. 27.10.2013)638. The gas used to extinguish fire is

(1) Neon (2) Nitrogen(3) Carbon dioxide(4) Carbon monoxide


639. An alloy used in making heatingelements for electric heating de-vice is(1) Solder (2) Alloy Steel(3) Nichrome (4) German Silver

(SSC (10+2) Level Data EntryOperator & LDC Exam.10.11.2013, Ist Sitting)

640. The degree of dissociation of anelectrolyte depends on(1) dilution(2) impurities(3) atmospheric pressure(4) method of dissolution


641. The gas causing acid rain in anindustrial area is(1) Carbon dioxide(2) Carbon monoxide(3) Sulphur dioxide(4) Methane


642. The pH of lemon juice is expectedto be(1) equal to 7(2) nothing can be predicted(3) less than 7(4) more than 7

(SSC (10+2) Level Data EntryOperator & LDC Exam.

10.11.2013, IInd Sitting)643. An example of heterocyclic com-

pound is(1) Naphthalene (2) Furan(3) Benzene (4) Anthracene


10.11.2013, IInd Sitting)644. In electro-refining, the pure

metal is deposited on(1) vessel (2) electrolyte(3) cathode (4) anode


10.11.2013, IInd Sitting)645. Natural rubber is a polymer of

(1) Vinyl acetate (2) Propene(3) Isoprene (4) Styrene


10.11.2013, IInd Sitting)646. Which is not an anasthetic agent

in surgical operations?(1) Chloroform(2) Ether(3) Nitrous oxide(4) Acetone


647. Brass is an alloy of :(1) Cu, Al and Zn(2) Cu and Sn(3) Cu and Zn(4) Al and Mg


648. Rectified spirit is :(1) 95% ethyl alcohol(2) 100% ethyl alcohol(3) methylated spirit (4) tinctureiodine


649. Nylon is made up of :(1) Polyamide(2) Polyester(3) Polyethylene(4) Polypropylene


650. Sweat contains water and_______.(1) Citric acid (2) Lactic acid(3) Salt (4) Vinegar


651. How many bones are there in anewly born infant ?(1) 206 (2) 230(3) 280 (4) 300


652. Radiations which is not emittedduring radioactivity is :(1) a rays (2) b ravs(3) g ravs (4) Cathode rays


653. Citric acid is present in freeform in(1) Tamarind (2) Milk

(3) Apple (4) Lemon(SSC Multi-Tasking Staff

(Patna) Exam. 16.02.2014)

654. KMnO4 can be used as(1) Insecticide (2) Fertilizer

(3) Pesticide (4) Disinfectant(SSC Multi-Tasking Staff

(Patna) Exam. 16.02.2014)

655. A thick paste of cement, sandand water is called(1) Concrete (2) R.C.C.

(3) Mortar (4) Kiln(SSC Multi-Tasking Staff

(Patna) Exam. 16.02.2014)

656. Which of the following is not achemical reaction'?(1) Burning of paper(2) Digestion ot" food(3) Conversion of water into

steam

(4) Burning of coal(SSC Multi-Tasking Staff

(Patna) Exam. 16.02.2014)

657. Which of the following is usedas anesthetic ?(1) NH3 (2) NO

(3) NO2 (4) N2O(SSC Multi-Tasking Staff

(Patna) Exam. 16.02.2014)

658. The quality of petrol is expressedin terms of(1) Cetane number(2) Gold number(3) Octane number

(4) Added unlead compounds(SSC Multi-Tasking Staff

(Patna) Exam. 16.02.2014)



CHEMISTRY

SGAE–785

659. The percentage of litrogen inAir is(1) 0.94 (2) 0.03

(3) 78.03 (4) 85.02(SSC Multi-Tasking Staff

(Patna) Exam. 16.02.2014)

660. Antacids are found in drugs thatgive relief to(1) Eye sight(2) Stomach ache(3) Acne

(4) Headache(SSC Multi-Tasking Staff

(Patna) Exam. 16.02.2014)

661. The open "Sigrees" or coal stovesoften require fanning to sustainburning because of(1) tendency of carbon dioxide

to form a layer along withdust smoke

(2) lack of oxygen in the sur-roundings of sigrees

(3) accumulation of smoke anddust over the sigrees

(4) interrupted release of mois-ture from the material

(SSC Multi-Tasking (Non-Tech.) StaffExam. 23.02.2014, IInd Sitting)

662. Browning of paper in old booksis caused by(1) frequent use(2) lack of aeration(3) collection of dust(4) oxidation of cellulose


663. Aquaregia is a mixture of thefollowing in the ratio 1 : 3 byvolume(1) conc. HNO3 and conc. HCl(2) conc. HNO3 and conc.

H2SO4(3) dil. HCl and dil. HNO3(4) conc. HCl and conc. HNO3


664. In deep-sea diving, divers use amixture of gases consisting ofoxygen and(1) hydrogen (2) nitrogen(3) argon (4) helium


665. ‘Atomic theory’ of matter wasgiven by(1) Avogadro (2) Dalton(3) Newton (4) Pascal


666. Combustion of a candle is a/an(1) photochemical reaction(2) physical change(3) endothermic reaction(4) exothermic reaction


667. Which among the following is acovalent compound ?(1) Calcium chloride(2) Magnesium fluoride(3) Sodium chloride(4) Carbon tetrachloride


668. The highest volume of gases inlower atmosphere is comprised of(1) Hydrogen

(2) Carbon dioxide(3) Oxygen

(4) Nitrogen(SSC Multi-Tasking (Non-Tech.) Staff

Exam. 23.02.2014, IInd Sitting)

669. The percentage of carbon in cost

iron is :

(1) 0.01 to 0.25

(2) 0.5 to 1.5

(3) 6 to 8

(4) 3 to 5(SSC CGL Tier-I

Re-Exam–2013, 27.04.2014)

670. The compound that has the leastvalue for octane number is :

(1) 2-methyl heptane

(2) Iso-octane

(3) 2,2-dimethyl hexane

(4) n-heptane

(SSC CGL Tier-IRe-Exam–2013, 27.04.2014)

671. The pair of compounds used asanaesthetic in medicines :

(1) Ether, Ammonia(2) Nitrous oxide, Chloroform

(3) Chloroform, Nitrogen dioxide(4) Nitrogen dioxide, ether

(SSC CGL Tier-I

Re-Exam–2013, 27.04.2014)

672. pH scale ranges from(1) 0 – 7 (2) 8 – 14(3) 0 – 14 (4) None

(SSC CGL Tier-I

Re-Exam–2013, 27.04.2014)

673. Iron rusts quickly in(1) Rain water(2) Sea water(3) Distilled water(4) River water


674. Aerated water contains(1) SO2 (2) NO2

(3) H2 (4) CO2


675. Magnetite is(1) Fe2O3 (2) Fe3O4

(3) FeCO3 (4) 2Fe2O3. 3H2O(SSC CGL Tier-I

Re-Exam–2013, 27.04.2014)

676. Iron is prevented from rustingby coating with zinc. This pro-cess is called as(1) Galvanisation(2) Corrosion(3) Sublimation(4) Reduction


677. Which of the following is themaximum number of electronsthat can be present in M-shell?(1) 2 (2) 8(3) 18 (4) 32

(SSC CAPFs SI, CISF ASI & DelhiPolice SI Exam. 22.06.2014)

678. In an oxygen molecule, two at-oms are united by(1) one bond (2) two bonds(3) three bonds (4) four bonds


679. The inert gas which is substitut-ed for nitrogen in the air used bydeep sea divers for breathing is

(1) Neon (2) Krypton

(3) Argon (4) Helium(SSC CAPFs SI, CISF ASI & Delhi

Police SI Exam. 22.06.2014)680. How many neutrons are there in

92U238 atom ?

(1) 92 (2) 238(3) 146 (4) 330


681. White phosphorus is generallykept under(1) Alcohol (2) Water(3) Glycerine (4) Kerosene oil




CHEMISTRY

SGAE–786

682. The wire of flash bulbs is madeup of(1) Mg (2) Ba(3) Cu (4) Ag


683. For a spontaneous process(1) DG is +ve(2) DG is –ve(3) DG is equal to zero(4) DH is –ve


684. Which of the following has thehighest penetrating power?(1) a-ray (2) b-ray(3) g-ray (4) d-ray


685. When cathode rays strike a tar-get of high atomic weight, theygive rise to(1) a -rays (2) b and g rays(3) X-rays (4) positive rays

(SSC CGL Tier-I Re-Exam. (2013)20.07.2014, Ist Sitting)

686. The major use of sulphur is inthe manufacture of(1) H2SO4 (2) H2S(3) SO2 (4) Fungicide


687. Atoms of different elements have(1) same atomic number and

same electronic configur-ation

(2) different atomic number andsame eletronic configu-ration

(3) different atomic number anddifferent number of valenceelectrons

(4) same number of electrons andneutrons


688. Organic compounds are(1) Covalent compounds(2) Ionic compounds(3) Co-ordination compounds(4) Interstitial compounds


689. Which one of the following ele-ments exhibits the greatest ten-dency to lose electrons ?(1) Fluorine (2) Lithium(3) Oxygen (4) Zinc

(SSC CGL Tier-I Re-Exam. (2013)20.07.2014, IInd Sitting)

690. Poison used for killing rats is(1) Calcium phosphide (Ca3P2)(2) Zinc phosphide (Zn3P2)(3) Magnesium nitride (Mg3N2)(4) Magnesium phosphide

(Mg3P2)(SSC CGL Tier-I Re-Exam. (2013)

20.07.2014, IInd Sitting)

691. Antacid tablets consist of(1) Hydroxides of sodium, mag-

nesium and aluminium(2) Hydroxides of magnesium

and aluminium(3) Hydroxides of sodium and

aluminium(4) Hydroxides of magnesium

and sodium(SSC CGL Tier-I Re-Exam. (2013)

20.07.2014, IInd Sitting)

692. The element absorbed both incation and anion form is(1) Sulphur (2) Nitrogen(3) Calcium (4) Phosphorus


693. Nucleons are regarded as com-posites sub-particles known as(1) Mesons (2) Quarks(3) Leptons (4) Photons


694. Which of the following is not agreenhouse gas ?(1) Water vapour(2) O2(3) O3 (4) CO2


695. Interveinal necrotic spots onleaves appear due to(1) HF injury (2) SO2 injury(3) NO2 injury (4) O3 injury


696. The pollutant responsible forozone holes is _____.(1) CO2 (2) SO2

(3) CO (4) CFC(SSC GL Tier-I Exam.

19.10.2014, Ist Sitting)697. The alkoloid naturally found in

coffee, cocoa and cola nut is(1) Cocaine (2) Morphine(3) Tannin (4) Caffeine

(SSC GL Tier-I Exam.19.10.2014, Ist Sitting)

698. The metal used for making air-crafts and rockets is(1) Lead (2) Aluminium(3) Nickel (4) Copper


699. The process of improving thequality of rubber by heating itwith sulphur is called.(1) Vulcanization(2) Acceleration(3) Sulphonation(4) Galvanization


700. Which of the following is not anoble gas ?(1) Hydrogen (2) Helium(3) Neon (4) Argon


701. Which of the following is veryreactive and kept in kerosene?(1) Sodium (2) Potassium(3) Iodine (4) Bromine(SSC GL Tier-I Exam. 19.10.2014)

702. In the periodic table of elements,on moving from left to rightacross a period, the atomic ra-dius(1) decreases(2) increases(3) remains unchanged(4) does not follow a definite

pattern(SSC GL Tier-I Exam. 19.10.2014)

703. Vulcanized rubber contains sul-phur(1) 2% (2) 3-5%(3) 7-9% (4) 10-15%(SSC GL Tier-I Exam. 19.10.2014)

704. Which of the following is a me-tallic ore ?(1) Mica (2) Quartz(3) Feldspar (4) Galena(SSC GL Tier-I Exam. 19.10.2014)

705. The moderator used in a nuclearreactor is(1) Uranium(2) Radium(3) Ordinary water(4) Graphite

(SSC GL Tier-IExam. 26.10.2014)

706. The chemical name of “Plasterof Paris” commonly used for set-ting broken bones is(1) Calcium nitrate(2) Calcium sulphate(3) Calcium carbonate(4) Calcium chloride




CHEMISTRY

SGAE–787

707. The apparatus used to test acid-ity of aqueous solution is(1) pH meter (2) Ammeter(3) Hygrometer(4) Acidmeter


708. Chemical formula of washingsoda is

(1) Na2SO4.10H2O

(2) NaHCO3

(3) Na2CO3.10H2O

(4) Ca(OH)2(SSC CHSL (10+2) DEO & LDC

Exam. 02.11.2014, Patna Region :Ist Sitting)

709. Hydrochloric acid is also knownas(1) Galic acid(2) Picric acid

(3) Muriatic acid

(4) Chloric acid(SSC CHSL (10+2) DEO & LDC


710. The inert gas used as beacon lightis

(1) Kr (2) Ar(3) He (4) Ne

(SSC CHSL (10+2) DEO & LDCExam. 02.11.2014, Patna Region :

Ist Sitting)

711. The chemical name of baking

soda is

(1) Sodium carbonate

(2) Sodium bicarbonate

(3) Sodium chloride

(4) Sodium nitrate(SSC CHSL (10+2) DEO & LDC


712. Chemical name of common saltis(1) Sodium Chloride(2) Sodium Bicarbonate(3) Sodium(4) Sodium Oxide

(SSC CHSL (10+2) DEO & LDCExam. 02.11.2014, IInd Sitting)

713. Which one of the following min-eral does not contain oxygen ?(1) Haematite (2) Bauxite(3) Cryolite (4) Calcite


714. A non–electronic conductor is(1) Iron(2) Gas Carbon(3) Copper Sulphate(4) Mercury


715. Which of the following will re-place hydrogen from acids toform salts ?(1) S (2) Na(3) Ag (4) P


716. Which of the following metals has

least melting point ?(1) Gold (2) Silver(3) Mercury (4) Copper

(SSC CHSL (10+2) DEO & LDCExam. 09.11.2014)

717. The gas produced in marshyplaces due to decomposition ofvegetation is

(1) Carbon monoxide

(2) Carbon dioxide

(3) Sulphur dioxide

(4) Methane(SSC CHSL (10+2) DEO & LDC

Exam. 09.11.2014)718. The chemical name of ‘‘Hypo’’

commonly used in photographyis

(1) Sodium thiosulphate

(2) Silver nitrate

(3) Sodium nitrate

(4) Silver iodide(SSC CHSL (10+2) DEO & LDC

Exam. 09.11.2014)719. Carborundum is another name

of(1) Silicon carbide(2) Silicon oxide(3) Calcium carbide(4) Calcium oxide

(SSC CHSL (10+2) DEO & LDCExam. 16.11.2014,

Patna Region : Ist Sitting)

720. Number of atoms present in onemole of a gas at STP is

(1) 6.023 × 1020

(2) 6.023 × 1023

(3) 6.023 × 10–23

(4) 6.023 × 10–20



721. Number of neutrons in an atomof hydrogen is(1) One (2) Zero(3) Two (4) Three


Patna Region : Ist Sitting)722. The heat value of combustion of

Gasoline is(1) 12600 kJ/kg(2) 14600 kJ/kg(3) 39400 kJ/kg(4) 47000 kJ/kg


Patna Region : Ist Sitting)723. Who developed the model of

atomic structure ?(1) Bohr and Rutherford(2) Volta(3) Alfred Nobel(4) Faraday



724. Sodium Carbonate is commonlyknown as(1) Baking Soda(2) Washing Soda(3) Caustic Soda(4) Caustic Potash


725. When a bond is formed betweentwo atoms, the energy of the sys-tem will(1) increase(2) decrease(3) remain the same(4) may increase or decrease


726. If the equilibrium constants forthe systems H2 + I2 ®¬ 2HI and

2HI ®¬ H2 + I2 are K1 and K2respectively, the relationshipbetween K1 and K2 is :(1) K1 = K2 (2) K1 = 2K2

(3) K1 =K2

2(4) K1 =

1K2


727. Concentration of a material whichis lethal to 50% animal is called(1) LD50 (2) LC50(3) NOAEL (4) ADI




CHEMISTRY

SGAE–788

728. Muddy water is treated withalum in purification process, itistermed as :(1) emulsification (2)absorption

(3) adsorption (4) coagulation(SSC CGL Tier-I Exam, 16.08.2015

(Ist Sitting) TF No. 3196279)

729. Brass contains(1) Copper and Zinc(2) Copper and Tin(3) Copper and Silver(4) Copper and Nickel(SSC CGL Tier-I Exam. 19.10.2014

TF No. 022 MH 3)

730. Which is the purest commercialform of iron ?(1) Pig iron(2) Steel(3) Stainless steel(4) Wrought iron(SSC CGL Tier-I Exam. 19.10.2014

TF No. 022 MH 3)

731. In galvanization, iron is coatedwith

(1) Copper (2) Zinc(3) Tin (4) Nickel(SSC CGL Tier-I Exam. 19.10.2014

TF No. 022 MH 3)

732. Which one of the folling is alsokhow as solution ?(1) A compound(2) A homogeneous mixture

(3) A heterogeneous mixture

(4) A suspension(SSC CGL Tier-I Exam. 19.10.2014

TF No. 022 MH 3)

733. A solution is

(1) a homogeneous mixture oftwo or more substances

(2) a solid dissolved in a liquid

(3) a solid dissolved i water

(4) a mixture of two liquids(SSC CHSL (10+2) DEO & LDCExam. 16.11.2014 , Ist Sitting

TF No. 333 LO 2)

734. The first organic compound syn-thesised in the laboratory was

(1) Urea (2) Uric acid

(3) Lactic acid (4) Glucose(SSC CHSL (10+2) DEO & LDCExam. 16.11.2014 , Ist Sitting

TF No. 333 LO 2)

735. The buffer action of blood is dueto the presence of

(1) HCI and NaCI

(2) CI– and CO32-

(3) CI–

and HCO3-

(4) HCO3- and H2CO3

(SSC CHSL (10+2) DEO & LDCExam. 16.11.2014 , Ist Sitting

TF No. 333 LO 2)

736. Which one of the following con-tains maximum percentage ofcarbon ?

(1) Cast iron

(2) Stainless steel

(3) Wrought iron

(4) High speed steel(SSC CHSL (10+2) DEO & LDCExam. 16.11.2014 , Ist Sitting

TF No. 333 LO 2)

737. Which of the following appearedto be with a significant potentialfor accumulation through foodchains ?

(1) DDT (2) Parathion

(3) Lindane (4) Carbary(SSC CHSL (10+2) DEO & LDCExam. 16.11.2014 , Ist Sitting

TF No. 333 LO 2)

738. Which one of the following ele-ments is an example of noblegas ?(1) Nitrogen (2) Hydrogen(3) Chlorine (4) Helium

(SSC CHSL (10+2) DEO & LDCExam. 16.11.2014, IInd Sitting

TF No. 545 QP 6)

739. Which of the following elementsdoes not exhibit natural radioac-tivity ?(1) Uranium (2) Thorium(3) Aluminium (4) Polonium

(SSC CHSL (10+2) DEO & LDCExam. 16.11.2014, IInd Sitting

TF No. 545 QP 6)

740. The most abundant element is(1) Calcium (2) Silicon(3) Oxygen (4) Nitrogen

(SSC CAPFs SI, CISF ASI & DelhiPolice SI Exam, 21.06.2015


741. Aluminium salt commonly usedto stop bleeding is(1) Aluminium nitrate(2) Aluminium sulphate(3) Aluminium Chloride(4) Potash alum



742. Nitrogen in water is commonlyfound in the form of(1) Nitrous oxide (2) Nitrate(3) Nitric oxide (4) Nitrite



743. Chemical name of Gammaxane is(1) Toluene(2) Chloro benzene(3) Aniline(4) Benzene hexachloride



744. Which element behaveschemically both as metal and non-metal ?(1) Argon (2) Boron(3) Xenon (4) Carbon


IInd Sitting)

745. The amount of oxygen in the at-mosphere remains relatively con-stant because it is given off by(1) Oceans (2) Animals(3) Rocks (4) Plants


IInd Sitting)

746. Water gas is the combination of

(1) CO and H2 (2) CO2 and H2

(3) CO and H2O (4) CO2 and CO(SSC CAPFs SI, CISF ASI & Delhi

Police SI Exam, 21.06.2015IInd Sitting)

747. Which of the following elementsis obtained from sea weeds ?(1) Iodine (2) Vanadium(3) Argon (4) Sulphur


IInd Sitting)

748. Acid Rain is caused due to pol-lution of atmosphere by(1) Oxides of nitrogen and phos-

phorus(2) Oxides of carbon and nitrogen(3) Oxides of nitrogen and sul-

phur

(4) None of these(SSC CAPFs SI, CISF ASI & Delhi

Police SI Exam, 21.06.2015IInd Sitting)



CHEMISTRY

SGAE–789

749. Carbon footprint can be reduced by(1) All of these(2) Recycling waste materials(3) Using energy efficient appli-

ances

(4) Commuting by public trans-port


IInd Sitting)

750. Which one of the following isfound in Vinegar ?(1) Acetic acid(2) Propionic acid(3) Formic acid(4) Butyric acid


IInd Sitting)

751. Peroxyacetyl nitrate is a(1) Acidic dye(2) Plant hormone(3) Vitamin

(4) Secondary pollutant

(SSC CGL Tier-I Exam, 09.08.2015


752. The term ‘brown air’ is used for(1) Acid fumes(2) Photochemical smog(3) Sulphurous smog(4) Industrial smog(SSC CGL Tier-I Exam, 09.08.2015


753. What happens when a drop ofglycerol is added to crushedKMnO4 spread on a paper ?(1) There is a crackling sound.(2) There is a violent explosion.(3) There is no reaction.(4) The paper ignites.(SSC CGL Tier-I Exam, 09.08.2015


754. Most commonly used bleachingagent is(1) Sodium chloride

(2) Alcohol(3) Carbon dioxide(4) Chlorine(SSC CGL Tier-I Exam, 09.08.2015


755. Which of the following can befound as pollutants in the drink-ing water in some parts of In-dia?Select the correct answer usingthe code given below.

(A) Arsenic(B) Sorbitol(C) Fluoride(D) Formaldehyde(E) Uranium(1) B, D and E(2) A, B, C, D and E(3) A, C and E(4) A and C(SSC CGL Tier-I Exam, 09.08.2015

(IInd Sitting) TF No. 4239378)

756. Cyanide poisoning causes deathin seconds because(1) It denatures enzymes of the

heart/muscle(2) It breaks the electron trans-

port chain(3) It causes Lysis of red blood

cells.(4) It causes cardiac arrest(SSC CGL Tier-I Exam, 09.08.2015


757. The ore of Aluminium is(1) Fluorspar (2) Bauxite(3) Chalco pyrites (4) Hematite(SSC CGL Tier-I Exam, 09.08.2015


758. Heavy metals got their name be-cause compared to other atomsthey have(1) Higher densities(2) Higher atomic masses(3) Higher atomic numbers(4) Higher atomic radii(SSC CGL Tier-I Exam, 09.08.2015


759. Photo chemical smog is a result-ant of the reaction among(1) High concentration of NO2,

O3, and CO in the evening(2) CO, CO2 and NO2 at low tem-

perature.(3) CO, O2 and peroxy acetyl ni-

trate in the presence of Sun-light

(4) NO2, O3 and peroxy acetylnitrate in the presence ofSunlight

(SSC CGL Tier-I Exam, 09.08.2015(IInd Sitting) TF No. 4239378)

760. Which of the following particleshas the dual nature of particle–wave?(1) Electron (2) Meson(3) Proton (4) Neutron(SSC CGL Tier-I Exam, 16.08.2015


761. Ultra purification of a metal isdone by :

(1) slugging (2) zone melting(3) smelting (4) leaching(SSC CGL Tier-I Exam, 16.08.2015


762. The soft silvery metalic elementwhich ionizes easily when heat-ed or exposed to light and ispresent in atomic clocks is :(1) Cerium (2) Cesium(3) Calcium (4) Califonrium(SSC CGL Tier-I Exam, 16.08.2015


763. Catalytic converters are gener-ally made from :(1) Alkaline metals(2) Hydrogen(3) Transition metals(4) Carbon(SSC CGL Tier-I Exam, 16.08.2015


764. The green colour seen in fire-work displays is due to thechloride salt of :(1) Sodium (2) Strontium(3) Barium (4) Calcium(SSC CGL Tier-I Exam, 16.08.2015


765. The radiation that can penetratedeepest in our body(1) UV-radiation(2) Alpha-particles(3) b-particles(4) Gamma-particles

(SSC CGL Tier-IRe-Exam, 30.08.2015)

766. Which one of the following doesnot contain silver ?(1) Horn silver(2) Ruby silver(3) German silver(4) Lunar caustic


767. An important green-house gasother than methane being pro-duced from the agriculturalfields is(1) Nitrous oxide(2) Ammonia(3) Sulphur dioxide(4) Arsine




CHEMISTRY

SGAE–790

768. Acid rain is caused due to pol-lution of atmosphere by(1) oxides of carbon and nitrogen(2) oxides of nitrogen and sul-

phur(3) oxides of nitrogen and phos-

phorus(4) None of these


769. Which of the following chemicalsis responsible for depletion ofozone layer in the atmosphere?(1) Chlorofluorocarbons(2) Nitrous oxide(3) Sulphur dioxide(4) Carbon dioxide

(SSC CGL Tier-I Re-Exam, 30.08.2015)

770. Chemical composition of heavywater is :(1) H2O2 (2) H2O(3) HDO (4) D2O

(SSC Constable (GD)Exam, 04.10.2015, Ist Sitting)

771. Oxide of sulphur present in theatmosphere are washed down byrains to cause :(1) Depletion of fossil fuel re-

serves(2) Eutrophication in lakes(3) Lowering of pH of soil(4) Industrial smog formation

(SSC Constable (GD)Exam, 04.10.2015, Ist Sitting)

772. The acid which fails to liberatecarbon dioxide from sodium bi-carbonate is :(1) Acetic acid(2) Formic acid(3) Carbonic acid(4) Sulphuric acid

(SSC Constable (GD)

Exam, 04.10.2015, Ist Sitting)

773. Which one of the following is notcoal variety?

(1) Lignite (2) Bituminous

(3) Dolomite (4) Peat(SSC CHSL (10+2) LDC, DEO & PA/SA

Exam, 01.11.2015, IInd Sitting)

774. Dry ice is the solid form of :

(1) Air

(2) Carbon di–oxide

(3) Nitrogen (4) Water(SSC CHSL (10+2) LDC, DEO & PA/SA


775. The common name of sodium bi-carbonate is

(1) Soda ash (2) Baking soda

(3) Soda lime (4) Baking powder(SSC CHSL (10+2) LDC, DEO & PA/SA


776. If there is one million Mg2+ ionsin MgCl2, how many chloride ionsare there?

(1) Two million (2) One million

(3) Half a million (4) Ten million(SSC CHSL (10+2) LDC, DEO & PA/SA


777. The gas that causes suffocationand death when coal or coke isburnt in a closed room is(1) Methane(2) Ethane(3) Carbon monoxide(4) Carbon di–oxide

(SSC CHSL (10+2) LDC, DEO & PA/SAExam, 01.11.2015, IInd Sitting)

778. Air is said to be saturated when :(1) it contains maximum content

of water vapour(2) its pressure is minimum(3) its thickness is maximum(4) it blows over the barren land

(SSC CHSL (10+2) LDC, DEO& PA/SA Exam, 15.11.2015(Ist Sitting) TF No. 6636838)

779. Atoms having the same numberof protons but different numberof neutrons are called :(1) Isotopes (2) Cations(3) Higgs-boson (4) Anions


780. Soap helps in better cleaning ofclothes because(1) Soap acts like catalyst(2) It reduces the surface ten-

sion of solution(3) It gives strength to solution(4) It absorbs the dirt


781. The most suitable unit for ex-pressing nuclear radius is :(1) nanometre (2) fermi(3) angstrom (4) micron

(SSC CHSL (10+2) LDC, DEO& PA/SA Exam, 15.11.2015(IInd Sitting) TF No. 7203752)

782. Iron filings can be separatedfrom a heterogenous mixtureusing the technique of :(1) Sublimation(2) Magnetization(3) Sedimentation(4) Evaporation


783. The most abundant element bynumber in the living system is :(1) Nitrogen (2) Hydrogen(3) Oxygen (4) Carbon


784. The “King of Metals” is :(1) Gold (2) Silver(3) Iron (4) Aluminium


785. The strongest oxidizing agentamong the following is:(1) Chlorine (2) Iodine(3) Fluorine (4) Oxygen


786. Organic food is supposed to bebetter for human consumptionbecause :(1) It is grown in glass house &

air tight environment.(2) It is grown without the useof chemicals & synthetic pesti-

cides.(3) It depends on chemicals &

fertilizers.(4) It is too expensive to buy.


787. The main component of liquidbleach is:(1) Sodium chloride(2) Sodium hypochlorite(3) Hydrochloric acid(4) Sodium hypochlorate


788. Chile saltpeter is the commonname of:(1) Sodium nitrate(2) Potassium nitrite(3) Potassium nitrate(4) Sodium nitrite




CHEMISTRY

SGAE–791

789. The gas liberated in the Bhopalgas tragedy was:(1) Pheynl isocynate(2) Acetylene(3) Ethylene(4) Methyl isocynate


790. In a reaction of the type A+B® C+D one could ensure it tobe a first order reaction by :(1) Increasing the temperature(2) Increasing the concentration

of a product(3) Increasing the concentration

of a reactant(4) Adding a catalyst

(SSC CHSL (10+2) LDC, DEO& PA/SA Exam, 06.12.2015


791. Stalactites and Stalagmites formdue to the precipitation of :(1) CaCO3 (2) CaCl2(3) MgCl2 (4) MgCO3



792. Soldering of two metals is possi-ble because of the property of :(1) Viscosity (2) Osmosis(3) Cohesion(4) Surface tension



793. An electrochemical cell which isused as a source of direct elec-trical current at constant voltageunder standard conditions iscalled a :(1) Power transmittor(2) Battery(3) Uninterrupted power supply

(UPS)(4) Generator



794. The gas dissolved in water thatmakes it basic is :(1) ammonia(2) sulphur dioxide(3) hydrogen(4) carbon dioxide



795. The number of hydrogen bondsbetween guanine and cytosine inDNA is(1) 2 (2) 3(3) 4 (4) 1


796. The deterioration of a metal byan electrochemical process iscommonly termed as(1) Erosion (2) Corrosion(3) Passivation (4) Abrasion


797. Which gas emitted by power sta-tions causes acid rain?(1) Carbon dioxide(2) Sulphur dioxide(3) Helium(4) Nitrogen


798. Heavy water is(1) Deuterium(2) Rain water(3) Tritium oxide(4) Deuterium oxide

(SSC (10+2) Stenographer Grade

‘C’ & ‘D’ Exam. 31.07.2016)

799. Which of the following is thestrongest base in aqueous solu-tion ?(1) Diethylamine(2) Triethylamine(3) Ammonia(4) Ethylamine


‘C’ & ‘D’ Exam. 31.07.2016)

800. The inert gas which is substitut-ed for nitrogen in the air usedby deep sea divers for breath-ing, is(1) Xenon (2) Krypton(3) Argon (4) Helium


‘C’ & ‘D’ Exam. 31.07.2016)

801. An acid having basicity one is(1) Sodium dihydrogen phos-

phate(2) Disodium hydrogen phos-

phate(3) Sodium phosphate(4) Phosphoric acid


‘C’ & ‘D’ Exam. 31.07.2016)

802. Which one of the following vege-table oils is used in the manu-facture of paints?(1) Palm oil(2) Sunflower oil(3) Linseed oil(4) Cottonseed oil

(SSC (10+2) Stenographer Grade ‘C’ & ‘D’ Exam. 31.07.2016)

803. Acid rain is caused by thepollution of environment by(1) Carbon monoxide and Carbon

dioxide(2) Ozone and Carbon dioxide(3) Nitrous oxide and Sulphur

dioxide(4) Carbon dioxide and Nitrogen


804. Which of the following is not agaseous air pollutant?(1) Oxides of nitrogen(2) Hydrocarbon(3) Smoke(4) Oxides of sulphur


805. At room temperature, the metalthat remains liquid is:(1) Mercury (2) Platinum(3) Lead (4) Zinc

(SSC CGL Tier-I (CBE)Exam. 10.09.2016)

806. Which is known as carbolic acid?(1) Phenol (2) Ethanol(3) Acetic acid (4) Oxalic acid


807. Atomic explosion is triggered by(1) thermo nuclear reaction(2) chemical reaction(3) controlled chain reaction(4) uncontrolled chain reaction


808. Which method will be employedto test the hardness of water?(1) Boiling(2) Distillation(3) Formation of lather with soap(4) None of these

(SSC CGL Tier-I (CBE) Exam.11.09.2016, (Ist Sitting))

809. J.J. Thomson’s proposed modelof action is generally called................... model.(1) Cream and cake(2) Plum and pudding(4) Plum and cake(4) Cream and pudding

(SSC CPO SI, ASI Online Exam.05.06.2016, (2nd Sitting))



CHEMISTRY - Brilliant Academy

Documents

Transcript of CHEMISTRY - Brilliant Academy