JEE MAIN-NEW PATTERN
CHEMISTRY NUMERICAL VALUE & INTEGER ANSWER TYPE QUESTIONS
1. A light of wavelength 200nm falls upon a surface and two different wavelength
photons 800nm and 400nm are emitted from the surface. 80% of the energy
absorbed is re-emitted in the form of photon. Number of photons emitted as 800nm
is 3 times that of number of photons emitted as 400nm . If the ratio of total absorbed
photon to total emitted photon is x. then find the numerical value of (12.8x)
Key: 5
2. A light of wavelength 3000 falls on a metal surface. Ejected e- is further accelerated
by a potential difference of 2V, then final K.E of the e- is found to be 198 10 J . If
threshold energy for the metal surface is ' ' eV. Then find the numerical value of 8 Key: 9
3. In H sample, e- is present in the orbit in which angular momentum of e- is 2h
.
Electron make transition upto ground state. If 3rd highest energy photon has energy of
X eV then approximate numerical value of 25x
is
Key: 4
4. In He ion sample e- is in ground state, if photon of energy 52.24eV is given to the
sample all the atom goes to higher energy state. It again falls back up to ground state.
If it is not emitting any lines in Balmer series then what is the maximum possible
number of spectral lines observed
Key: 6
5. An element with mass number 95 have 4 unit positive charge and 25% more
neutrons than electrons in the given ionic state. Its atomic number is Z,then
find the value of (Z/10) .
Key: 4
6. Atomic number of Hydrogen like species that has a wave length difference of 59.3 nm
between first line of Balmer and first line of Lyman series is?
Key: 3
7. If the number of significant figures in 100 , 100. and 100.0 are X, Y and Z
respectively. What is the value of X+Y-Z ?
Key: 0
8. The difference in the oxidation states of the two central atoms (N and Cl ) in pernitric
acid and perchloric acid is
Key: 2
9. Chloride samples are prepared for analysis by using KCl, NaCl, NH4Cl separately or
as mixtures. What minimum volume of a 5% (by weight) AgNO3 solution (sp
gravity=1.04) must be added to a sample weighing 0.1g in order to ensure complete
precipitation of chloride in every possible case? Round off your answer to the nearest
integer.
Key: 6
10. An element forms a hydride containing 5.928% hydrogen. 0.1794g of the gaseous
hydride occupies 118mL at STP. If equivalent weight of element is X and molecular
weight of the hydride is Y; then report 10
X Y to the closest integer
Key: 5
11. One mole of an ideal gas at 300K expands isothermally and reversibly from 10 atm to
1 atm. Then maxU H W q is equal to –
Key: 0
12. The mole fraction of each gas for the greatest G in a mixture of four ideal gases at
constant temperature and pressure is 1x
and x is-
Key: 4
13. An insulated container contains 1 mole of a liquid, molar volume 100ml,at 1 bar.
When liquid is steeply pressed to 100 bar , volume decreases to 99 ml . Then
2xH barL . x is (nearly) –
Key: 5
14. Two acid solutions A and B are titrated separately each with 25mL of 1N Na2CO3
solution. The volume of each acid used for titration are 10 ml and 40 ml respectively.
Find out the volume ratio of acid B and A respectively ,which should be mixed to
prepare 1mL of 1N solution .
Key: 4
15. The heat of vaporization of water and heat of fusion of ice are 540 cal/g and
80 cal/g. Then the ratio of vap
fus
SS
for water is (nearly)-
Key: 5
16. Calculate pH of a solution containing 0.1M HA 5a(K 10 ) and 0.1 M HCl
Key: 1
17. Calculate the percentage of hydrolysis in 610 M aqueous solution of NaOCN.
10bK for OCN 10
Key: 1
18. How much water (in L) should be added to 10g 3CH COOH to give pOH equal to
11. 5a 3K CH COOH 1.8 10
Key: 3
19. Calculate pH when 100 ml of 0.2 M NaOH is reacted with 100ml of 0.2 M
53 aCH COOH K 10
Key: 9
20. Calculate pH of a solution prepared by mixing 100ml of 0.2 M B Cl (aq) with
100 ml 0.1M NaOH. Given 5aK B 10
Key: 5
21. A mixture of formic acid and oxalic acid is heated in presence of 2 4H SO
H2HCOOH H O CO
H2 2 4 2 2H C O H O CO CO
The produced gaseous mixture is collected and cooled. On its treatment with KOH
solution the volume of gaseous mixture decreases by one-tenth. Calculate the molar
ratio of the two acid in original mixture. [If the simplest ratio is a: b then fill your
answer as a + b]
Key: 9
22. To 1 litre solution containing 0.2 M Al+3 and 0.2M Zn+2, NaOH is added slowly, if
concentration of 3Al is x16 10 at the time when 2Zn OH just begins to precipitate,
then find x? 25
sp 3K Al OH 16 10
13sp 2
K Zn OH 2 10
Key: 7
23. A container whose volume is V contains an equilibrium mixture that consists of
2 moles each of 5 3PCl ,PCl and 2Cl (all are gases). The pressure is 3 bar and
temperature is T. A certain amount of 2Cl (g) is now added, Keeping the pressure and
temperature constant, until the equilibrium volume is 2V. Calculate the moles of 2Cl
added upto the nearest integer.
Key: 7
24. Count the number of species which can act as Bronsted Lowry acid as well as base in
aqueous medium
2 4 2 3 2 2 3H PO ,H PO , H PO ,B OH ,HS
Key: 3
25. How many among the following aqueous solution can act as a buffer solution
(i) 100 ml of 0.1M 3CH COONa + 50 ml of 0.1M HCl
(ii) 100 ml of 0.1M 3CH COOH 50ml of 0.1 M NaOH
(iii) 100 ml of 0.1 M Borax solution
(iv) 100 ml of 1 M 3 4H PO + 150 ml of 1M NaOH
(v) 100 ml of 0.1 M 4NH Cl + 50 ml of 0.1 M NaOH
Key: 5
26. The weight of glucose dissolved in 100 grm of water produce same lowering of vapor
pressure as 1 gm urea dissolved in 50gm of water at same temperature is
Key: 6
27. At 300 k the half-life a sample of a gaseous compound initially at 1 atm is 100 sec.
When the pressure is 0.5 atm the half-life is 50 sec. The order of reaction is
Key: 0
28. At 025 C vapor pressure of volatile liquid ‘A’ in pure state is 60 torr. To 4 mole of ‘A’
‘X’ mole ‘B’ volatile liquid is added, at 025 C . The vapor pressure of resulting solution
was found to be 72 torr, and mole fraction of ‘A’ in vapor phase is 13
, the value of ‘X’
is
Key: 6
29. 0.5 m solution of a non-volatile, non-electrolyte solute in a volatile solvent boils at
332.012K and boiling point of pure solvent is 330K and it’s molecular mass is 40.
Find its molar enthalpy of vaporisatron
Key: 9
30. A 0.4m aqueous solution of xNa A has freezing point 03.72 C . If 2fK H O is .1.86K kg 1mol . The value of ‘X’ is (salt is 100% ionised)
Key: 4
31. The human body contains about 18% carbon by weight. Of total carbon, 101.50 10 %
is 14C (by weight). The number of disintegrations occurring per minute in a person of
70 kg is 10 yx . The value of (x+y) is nearly ( half- life of 14C is 5570 years)
Key: 7
32.
3 2
11 1 1
k k
kM M MA B C
If all the reactions in the above system give first order kinetics what is the rate of
disappearance of ‘B’ in the given instant
Key: 0
33. For a first order reaction 3g gA B the concentration verses time graph is given below
What is the half life in minutes (answer to the nearest integer) ?
(log 2= 0.3, log 3 = 0.48)
Key: 5
34. 238
92U disintegrates to give 4 6and particles. The group number of the daughter
element in modern periodic table is
Key: 3
35. For a reaction ,A B the rate law expression is 1/ 2d AK A
dt
. If initial
concentration of A is A0. The number of correct statements are
i) The plot of A against ‘t’ will be linear
ii) The half life period is 1/ 2 0
2 2 1t A
K
iii) The integrated form of rate expression is 02KA t A
iv) Time taken for reaction is decreased for second half life than first half life period
v) When concentration of reactant is doubled rate increases to 4 times at that instant
Key: 4
36. The rate constant of a reaction at 027 C is 3 13 10 min . The fraction of molecules
crossing the energy barrier of the reaction at that temperature is 310 % . If temperature
is increased, the maximum value of rate constant k can be attained is 1100minx . The
value of x is
Key: 3
37. Half life of a radioactive nuclide is 20 years. If a sample of this nuclide has activity of
6400 dpm today, its activity (in dpm) after 100 years would be x 100dpm ; the value
of ‘x’ is :
Key: 2
38. How many of the following ions have the same magnetic moments?
2 2 2 2, , , Fe Mn Cr Ni
Key: 2
39. The ion nA is oxidized to 3AO by 4MnO changing to 2Mn in acidic medium. Given
that 32.68 10 mole of nA requires 31.61 10 mole of 4MnO .Thus, n is
Key: 2
40. An organic compound undergoes first order decomposition. The time taken for its
decomposition to 18
and 110
of its initial concentration are 1/8t and 1/10t respectively.
What is the value of 1/8
1/10
10tt
210log 0.3
Key: 9
41. Calculate the Hp at which the following conversion (reaction) will be at equilibrium
in basic medium
2 3I s I aq IO aq
When the equilibrium concentration at 300 k are 30.10 0.10I M and IO M
0 , 50 /fGiven G I aq kJ mol
03 , 123.5 /fG IO aq kJ mol
02 , 233 /fG H O l kJ mol
0 , 150 /fG OH aq kJ mol
R (Gas constant)= 25 /3
J mol K
2.3}Log e Key: 8
42. The ratio of the inversion temperature of a gas to its Boyle temperature is
Key: 2
43. 102 kg of NH3 (g) was heated with 320 kg oxygen in the first step and HNO3 is
prepare according to the given reactions. If the final solution has volume 500 lt. Then
what is molarity of HNO3 solution.
4NH3 (g) + 5O2 (g) 4 NO + 6 H2O
2NO(g) + O2 (g) 2NO2 (g)
3NO2 + H2O (l) 2HNO3 (g) + NO(g)
Key: 7
44. Magnetic moment of a 3-d a series element ‘A’ is 4.92BM if magnetic moment of A2+
is also 4.92BM then what is the group number of A in modern periodic table
Key: 8
45. Hydrogen peroxide in aqueous solution decomposes on warming to give oxygen
according to the equation 2H2O2(aq.) 2H2O(l) + O2(g), under conditions where one
mole of gas occupies 24 dm3, 100 cm3 of X M solution of H2O2 produces 6dm3 of O2.
X is thus –
Key: 5
46. Maximum individual oxidation number of Br-atom in Br3O8 is
Key: 6
47. Relative decrease in vapour pressure of an aqueous solution containing 2 moles
3 3 Cu NH Cl Cl in 3 moles of H2O is 0.50. On reaction with, AgNO3 how many moles
of AgCl will be precipitated.
Key: 1
48. How many of the following reactions are endothermic
(i) 4 4CH g C g H g (ii) 2 6 2 2 2C H O CO g H O l
(iii) Cl g e Cl g (iv) 2S g e S g
(v) Ne g e Ne g (vi) Li g e Li g
(vii) 2N g e N g Key: 4
49. A solution of 0.01 M HCOOH (ka = 2 × 10–4) and 0.01 M HCl has concentration of
HCOO– equal to 2 × 10–n. Then find the value of n
Key: 4
50. A non volatile solid P is dissolved in liquid X and progress of first order
decomposition P (in solution phase) X (l) + 2Q (g) is monitored by total pressure
measurement at 27°C. Data collected is:
0 10min20 80 100
Time t t t after long timeTotal pressure mm Hg mm Hg mm Hg
Calculate Half life of decomposition in minute.
Key: 5
51. Number of neutrons in a parent nucleus X, which gives 147 N after two successive
– emission would be :
Key: 9
52. A closed container of volume 0.02 m3 contains a mixture of Ne(A=20) and Ar(A=40)
at a temperature of 270C and a pressure of 105N/m2. If the total mass of mixture is 28
gm. Find the mass of Neon in grams.?
Key: 4
53. How many of the followings cations have non-inert gas configuration
4 2 3 2 2Tl ,Pb ,Hg ,Bi ,Pb ,Ag ,Cs , Be
Key: 6
54. What is the value of |x| + |y| where
x = lowest Possible formal charge on ‘N’ atom in Lewis structure(s) of azide ion( 13N )
y= highest possible formal charge on ‘N’ atom in Lewis structure(s) of azide ion
( 13N )
Key: 3
55. How many of the following molecule does not follow octet rule?
2 3 6 2 2 5, , , , , ,BeCl BF SF SF NO ClO PF
Key: 6
56. How many of the following molecules contain lone pair(s) on central atom in Lewis
dot structures?
2 4 3 2 3, , , ,NO SF O CO PCl Key: 3
57. The number of total electrons shared between nitrogen atoms in N2 is_____
Key: 6
58. Nitric Oxide decomposes through two parallel reactions
1K 12 2 1
1 1NO(g) O (g) N (g)K 8sec2 2
2K 12 2 2
1 1NO(g) O (g) O (g)K 4sec2 4
The reaction proceeds at constant volume. The initial mixture contained only nitric
oxide at a concentration of 4 Mol/Lt. Find the concentration (mol/lt) sum of 2N (g)
and nitrous oxide 2(N O) at 0.0575sec after the beginning of the reaction. (ln 2=0.69 )
Key: 1
59. At o25 C and 1 atm, 1 1P,MC 136 JK mol for benzene 6 6C H and 1 1
P,MC 156JK mol for
toluene 6 5 3C H CH . Find mix pC in 1 1JK mol when 100.0g of benzene and 100.0g of
toluene are mixed at o25 C and 1 atm to form an Ideal solution.
Key: 0
60. Carbon -11 , used in medical imaging, has a half-life of 20 minutes. The carbon-11
nuclides are formed, and the carbon atoms are then incorporated into an appropriate
compound. The resulting sample is injected into a patient, and the medical image is
obtained. If the entire process takes 53
hours, what percentage of the original carbon-
11 remains at this time ? Represent the answer upto the nearest integer.
Key: 3
61. The electronic configuration of few elements has been given. Total number of
elements that belongs to s-blocks is
i) 10 2Kr 4d 5s
ii) 10 1Xe 5d 6s
iii) 2 10 6 2Kr 5s 4d 5p 6s
iv) 21s
v) 2 14 10 6 1Xe 6s 4f 5d 6p 7s
vi) 14 0 2Xe 4f 5d 6s Key: 3
62. According to Kossel-lewis theory of chemical bonding numbers of corners of cube
that are occupied by valence electrons of N-atom are
Key: 5
63. Maximum number of hydrogen bonds a water molecule can form in ice ?
Key: 4
64. Number of hydrogen bonds in 9 4H O species is
Key: 3
65. The sum of number of sigma and pi bonds formed between two carbon atoms in 2CaC
are:
Key: 3
66. Number of pi-bonds in 2B is:
Key: 1
67. How many of the following statement(s) is/are true ?
1) During 2N formation, from N2 one electron is removed from the bonding molecular
orbitals
2) During 2O formation, from O2 one electron is removed from the antibonding
molecular orbital.
3) During 2O formation, from O2 one electron is added to the bonding molecular
orbital.
4) During CN formation, one electron is added to the bonding molecular orbital.
5) 1s molecular orbital has only one nodal plane.
6) *1s molecular orbital has only one nodal plane.
Key: 4
68. How many of the following metals can be detected in the laboratory through flame
test
i)Be ii)Mg iii) Na iv) K v)Ba
Key: 3
69. How many of the following produce H2(g) on reaction with NaOH –
B, Si , Al, Zn, Cl2, SnCl2 , ,HNO3, PbO2, H2S
Key: 4
70. How many of the following orders are given correctly
i) Order of stability 2 2 2 2CsO RbO KO NaO
ii) Order of melting points LiF LiCl LiBr LiI
iii) Order of density Cs Rb Na K Li
iv) Order of standard enthalpy of formation ( Only magnitude)
LiF NaF KF RbF CsF
v) Order of standard enthalpy of formation (Only magnitude)
CsLiCl NaCl KCl RbCl Cl
vi) Order of solubility LiOH NaOH KOH RbOH CsOH
vii) Order of solubility 4 4 4 4BeSO MgSO CaSO BaSO Key: 6
71. At 375K sodium carbonate exist as 2 3Na CO . 2xH O then x is
Key: 1
72. How many of the following metals whose nitrate salts decompose to give mixture of
2 2
( )g gNO and O
i) Li ii) Na iii) Ca iv) K v) Mg
vi) Sr vii) Ba
Key: 5
73. How many of the following molten state compounds liberate hydrogen gas at anode
during electrolysis using platinum electrodes
i)NaH ii) KH iii) RbH iv) CsH
v) 2BeH vi) 2CaH Key: 5
74. How many of the following exist only in solution state
i) 3LiHCO ii) 3NaHCO iii) 3KHCO iv) 3 2( )Mg HCO
v) 3 2( )Ca HCO vi) 3 2( )Ba HCO vii) 3RbHCO viii) 3CsHCO Key: 4
75. How many of the following under go disproportionation on reaction with NaOH
i) 2Cl ii)S iii)P (White) iv) B
v) Si vi) Al Vii) Hg
Key: 3
76. A solution of weak acid was titrated with base NaOH. The equivalence point was
reached when 36.12 ml of 0.1M- NaOH have been added. Now, 18.06ml 0.1M-HCl
was added to the titrated solution, the pH was found to be 5.0. the pKa of acid is
Key: 5
77. Hydrogen peroxide solution (20ml) reacts quantitatively with a solution of 4KMnO
(20ml) acidified with dilute 2 4H SO . The same volume of the KMnO4 solution is just
decolourized by 10 ml of MnSO4 in neutral medium, simultaneously forming a dark
brown precipitate of hydrated MnO2. The brown precipitate is dissolved in 10ml of
0.2M sodium oxalate under boiling condition in the presence of dilute H2SO4. The
strength of H2O2 solution in mg per 10 ml solution is (if “xy” the |x+y| is)
Key: 7
78. Find the number of effusion steps required to separate the isotopic mixture initially
containing some mass of hydrogen gas and 1 mole of deuterium gas in a 3 litre
container maintained at 24.63 atm and 300K to the final mass ratio of hydrogen to
deuterium gas equal to 4 : 1
Key: 4
79. An amount Q of heat is added to a monoatomic ideal gas in a process in which the
gas performs a work Q/2 on its surrounding. The molar heat capacity of gas (in cal/K-
mol) for the process is
Key: 6
80. The enthalpies of neutralization of a weak acid HA and a weak acid HB by NaOH are
-6900 cal/equivalent and -2900 cal/equivalent, respectively. When one equivalent of
NaOH is added to a solution containing one equivalent of HA and one equivalent of
HB, the enthalpy change was -3900 cal. If the base is distributed between HA and HB
in the ratio of 1:x, the value of ‘x’ is
Key: 3
81. When 1.0 of mole of H2(g) and 3.0 moles of I2 vapours are allowed to react, ‘x’ moles
of HI(g) is formed at equilibrium. Addition of a further 2.0 moles of H2(g) gave an
additional ‘x’ moles of HI(g) at new equilibrium. The value of equilibrium constant
for the reaction: 2 2 2H g I g HI g is
Key: 4
82. Potassium on burning in air forms compounds ‘X’. X on hydrolysis forms a solution
and releases a gas, How many antibonding electrons are present in the gas?
Key: 6
83. How many of the following compounds are polar ?
CH3Cl, NH3, CO2 , H2O , CH4 , PCl5 ,C2H2 ;
Key: 3
84. The diffusion coefficient of an ideal gas is directly proportional to its mean speed and
to its mean free path. The absolute temp of an ideal gas is increased 9 times and its
pressure is increased 3 times, due to which diffusion coefficient increases x times. The
value of ‘x’ is ______
Key: 9
85. A hydrogen atom in its ground state is irradiated by light of wavelength 972.5A .
Taking 6hc 1.237 10e
evm and the ground state energy of hydrogen atom as -13.6 ev,
the number of lines present in the emission spectrum is__________.
Key: 6
86. Assuming there no 2s – 2p mixing, the number of paramagnetic species amongst the
following: 2
2 2 2 2 2 2 2 2 2 2 2 2 2H , He , Li , Be , B ,C ,C , N , N ,O ,O ,S & F
are _______________.
Key: 6
87. The acid ionization (Ka) hydrated 3Al ion 32 6Al(H O) is 52 10 for the reaction,
2
32 6 2 2 3 (aq)5 (aq)
Al(H O) (aq) H O( ) Al H O OH H O
The pH of a 0.05M aqueous solutions of 3AlCl is __________
Key: 3
88. How many milliliters of 0.05M 4 6K Fe CN solution are required for titration of
60 ml of 0.01 M 4ZnSO solution, when the product of reaction is 2 3 6 2K Zn Fe CN ?
Key: 8
89. Out of , , , ,Be Mg Ca Sr and Ba number of elements which do not impart any colour to the
flame, is
Key: 2
90. On heating a mixture of 8 moles of 2 3Li CO and 3KHCO in 3: 1 ratio, the number of
moles of 2CO liberated is
Key: 7
91. 2 2Na O is a strong oxidizing agent. It oxidized chromic compounds into chromates.
How many moles of 2 2Na O are required to convert two moles of 3Cr OH into sodium
chromate?
Key: 3
92. In the compound 2 4 5 24 .8Na B O OH H O , if the
i)number of B-O-B bonds is’x’
ii)number of B-B bonds is ‘y’
iii)number of 2sp hybridized B atoms is’z’
Calculate the value of x+y+z.
Key: 7
93. 1 mole of 2 6B H g on hydrolysis yields………moles of 2H g .
Key: 6
94. Find the number of B-O bonds in peroxoborate.
Key: 8
95. How many of the following species have permanent dipole?
3 2 2 2 4 3 2 3O ,CO,CO , NO , N O,CH ,CFCl ,XeF ,ClF
Key: 6
96. The collision diameter for helium is 207 pm and for methane, 414 pm what is the ratio
of mean free path of He compare to that with methane under the same conditions?
Key: 4
97. 1 ml of 1 mol/L hydrochloric acid was diluted to 100 mL with water 10 mL of this
solution was further diluted to 100 mL with water. What is the Hp of the final
solution.
Key: 3
98. The number of species with fractional bond order is x and the number of paramagnetic
species are y. The value of | x y | is:
2 2 2 2 2 2 2B ,C , N ,O ,O ,He ,C
Key: 2
99. In the model of hydrogen like atom put forward by Niels Bohr (1913), the electron
orbits around the central nucleus. The Bohr radius of nth orbit of a hydrogen like
species is given by 2nr k
z where k is a constant. Find number of correct statement (s)
1. The principal quantum number, n of the orbit of 3Be that has the same Bohr radius
as that of ground state of hydrogen is 2.
2. The ratio of total energy of an electron in the ground state of 3Be ion to that of
ground state of H atom is16.
3. The ratio of de Broglie wave length of electron in the ground state of 3Be ion to
that of ground state of H atom is 2.
4. The ratio of time period of an electron to complete one cycle in the ground state of
3Be ion to that of ground state of H atom is 116
.
Key: 3
100. A closed vessel with rigid walls contains 1 mol of 23892 U and 1 mol of air at 298K.
Considering complete decay of 23892 U to 206
82 Pb , the ratio of the final pressure to the
initial pressure of the system at 298 K is?
Key: 9
101. How many of the following salts form an insoluble hydroxide with aqeous NaOH that
are soluble in excess NaOH ?
3 2 2 3 4 3AlCl ,SnCl ,PbCl ,CrCl , ZnSO ,FeCl Key: 5
102. Malonic acid 4 100150
P OC
Foul smell 0200 CA B +Carbon
The total number of sigma and Pi bonds present in the compound A are: ........
Key: 8
103. In cyclic silicate ion 126 18Si O the number of oxygen atoms shared are: .........
Key: 6
104. The number of oxygen atoms not acting as bridges (Si-O-Si) in the mineral kinoite
.22 2 3 10 2Ca Cu Si O H O .
Key: 8
105. How many of the following species have 2sp hybrid atoms?
Diamond, Graphite, 6 3 3 3 2 33 6, ; ; ; ;OC SiH N AlF AlCl monomer Al CH SiC , 3 3H BO ,
layered BN, Borazine.
Key: 7
106. How many of the following compounds are amphoteric?
2 3 2 2 2 2, ; : , , , , ,CO Al O SiO GeO SnO SnO PbO PbO CO Key: 5
107. How many of the following reactions produce a paramagnetic gas?
3 2AlH H O
2 3 2Al O C N
2AlN H O
. 2 42
Conc H SOH O
HCOOH
. 2 42 2 2
Conc H SOH O
CH COOH
2 5CO I O
2 3Fe O C Key: 0
108. In how many of the following reactions hydrogen gas is produced as one of the
product.
(i) Electrolysis of acidulated water
(ii) Passing steam over red hot coke.
(iii) Reaction of aluminium with sodium hydroxide
(iv) Reaction of Zinc with dil HCl
(v) Pyrolysis of hydrocarbons
(vi) Reaction of sodium amalgam with water.
(vii) By dissolving hydrolith in water.
(viii) By heating a mixture of steam and hydro carbons
(ix) Electrolysis of brine.
Key: 9
109. How many of them are 3-D silicates?
Feldspars, Ultra marines, Zeolites, Pyroxenes, Amphiboles, Beryl, Zircon, Asbestos
Key: 3
110. X = Oxidation, state of carbon in CO
Y = Oxidation state of carbon in COCl2
They y x is:
Key: 2
111. How many of the following reactions lead to the formation of CO as one of the
products?
2 . 2 4;
Conc H SOCOOH
. 2 4;
Conc H SOHCOOH
2 3 2Al O C Cl 4 6 2 4;dilute
H SOK Fe CN
4Ni CO 2 3B O C Key: 5
112. In how many of the following are hydrogen bonding (.......) possible in any of the
physical states
1) O H .....N 2) O H ......Cl 3) N H .....Cl
4) N H .....S 5) C H .....O 6) O H .....F
Key: 6
113. Coordination number of tin in the product formed in the reaction of tin with hot
concentrated aqueous solution of sodium hydroxide is?
Key: 6
114. An equilibrium mixture contain equal moles (n) of each 5 3 2,PCl PCl and Cl .If 203
mol
of 2Cl g is added at equilibrium at constant temperature and pressure, volume of the
system is double. What is n?
Key: 2
115. Consider the following first order decomposition process
Here “t” corresponds to the time at which 16
th
of reactant is decomposed the value of
‘n’ is
Key: 5
116. The number of alkali metals directly react with ‘C’ forms carbides
Li, Na, Be, Mg, Al, Sr, Ba, Ca, B, Si
Key: 1
117. No of metamers from the following molecules whose molecular formula is C6H12O
is/are........
3 2 2 2 3CH CH CO CH CH CH 3 3CH CO CH CH
3CH
3 2 2 2 2CH CH CH CH CH CHO 3CH3 2 3CH CH CO CH CH
3CH3 2 2CH CH CH CH CHO
3 2 2 2 3CH CO CH CH CH CH
3CH3 2 3CH CO CH CH CH
3CH3 2 3CH CO CH CH CH
3CH3 3CH CO C CH
3CH
3CH
3CH3C CO C CH
3CH3CH
3CH
Key: 6
118. The number of structural isomers of 4 10C H O is ‘X’ and for 2 6C H O is ’Y’.
Then the X + Y is..
Key: 9
119. The number of correct IUPAC names for the given compounds is..
i) 3 2 3CH CH CH CH C C CH : hept-2-en-5-yne.
ii) 2 2CH CH CH C CH : pent-1-en-4-yne.
iii) 3 2CH CH CH CH C CH : hex-4-en-1-yne.
iv) 2 2 3CH CH CH C C CH :hex-5-en-2-yne.
v) 3 33 3CH C CH CH C CH :1,2-di( 03 -butyl)ethene.
vi) 2 2NC CH CH CH CN
CN : propane -1,2,3-tricarbonitrile.
vii)
2CH CHO
: benzeneacetaldehyde.
Key: 4
120. The number of structural isomers possible for 6 6 3C H O containing benzene ring
(Do not consider peroxybond containing isomers) is X.
The number of structural isomers possible for 7 9C H N containing benzene ring is Y.
Then X + Y is....
Key: 8
121. The number of cyclic isomers for 5 10C H is ‘X’ and the number of open chain structural
isomers for 5 10C H is ‘Y’. Then X Y is..
Key: 0
122. How many orders are correct match?
(i) Boiling point: PH3 < AsH3 < NH3 < SbH3
(ii) Dipole moment: CH3F > CH3Cl > CH3Br
(iii) Bond angle: H2O < OF2 < OCl2
(iv) Solubility: BeSO4 > MgSO4 > CaSO4 > SrSO4 > BaSO4
(v) Acidic strength: Al2O3<B2O3 < SiO2 < CO2
Key: 4
123.
2
2
3
N
CaCO X CO
Carbon
Y Z
The number of lone pair electrons in the anion present in Z is ..
Key: 4
124. Energy required to stop the ejection of electrons from Cu-plate 0.27 eV.
Calculate the work function (in eV) When radiation of 235nm strikes the plate.
Key: 5
125. What is the oxidation number of thallium in the complex formed by the addition of
excess potassium iodide to thallium iodide in alkaline medium.
Key: 3
126. Some % of sample of 2N must be allowed to escape off. Its temperature, pressure and
volume are to be changed from 0220 C , 3 atm, 2L to 0110 C , 0.6 atm and 1L
respectively. If answer for % is mn % , what is the value of m n ?
Key: 1
127. How many chiral centres are present in the following compound?
Key: 6
128. Examine the following structural formulae and select those that are chiral.
a) C C C
HH
CH3 CH3
b)
H
H
C H 3
C H 3C l
C l
c)
d)
N
H
e) f)
g) h) i)
Key: 8
129. A 2:3 racemic mixture (by weight) has an observed specific rotation of 16º. The
specific rotation of the optically pure component is 10x degrees where x is
Key: 8
130. How many of the following acids are more acidic than acetic acid?
2FCH COOH , 2 2 6 5 2 2, , ,DCH COOH HOCH COOH C H COOH O N CH COOH Key: 4
131. Total number of stereo isomers 3 3CH CH D CH for the given compound is/are
Key: 4
132. on monochlorination give X number of isomeric products which on
fractional distillation give Y number of isomeric products. Find the value of 2 ?X Y Key: 0
133. How many statements are correct?
1. Trans cycloctene is chiral due to presence of chiral (stereo) axis.
2. Bulkiness order at ortho positions in Biphenyl system follow
3 2Br CH Cl NO
3.
OH
is an optically active compound
4.
OH
OHHO
HO
COOH
COOH is a meso compound due to plane of symmetry
Key: 1
134. Find the number of incorrect statements
I. Meso tartaric acid has different melting point than (+) Tartaric acid
II.
and
are conformational diastereomers
III.
MeO
NH
NH
H
H
OMe
is optically active molecule
IV.
N
this molecule has chiral centre and shows optical activity
Key: 1
135. How many of the following statements is/are true?
a)
IUPAC name of
NO2
Cl
CH3 is 2-chloro-1-methyl - 4 - nitrobenzene.
b) Amino acids may be detected by spraying the TLC plate with
ninhydrin solution.
c) Nitrogen, sulphur, halogens and phosphorus present in an organic
compound are detected by lassaigne's test.
d) Duma’s method is not applicable to nitrobenzene.
e) CCl4 do not give white ppt of AgCl on heating it with silver nitrate
solution.
f) It is necessary to use acetic acid and not sulfuric acid for acidification
of sodium extract for testing sulphur by lead acetate test.
g) In pyridine, all atoms lie on same plane.
h) No of dichloro derivatives of benzene is 2.
i) Azobenzene shows diastereomerism.
Key: 8
136. No of meso compounds possible for the following given compound is/are……..
OH
OH
OH
OH
OH
OH
Key: 7
137. For the first order reaction, t99.99% = xt90% then find the value of x
Key: 4
138. The heats of neutralisation of NH4OH by HNO2 and HCl are 8.6 and
13.3 kcal mol–1, respectively and that of NaOH by HCl is 13.7 kcal mol–1. Then the
heat of neutralisation of NaOH by HNO2 (in kcal mol–1) is
Key: 9
139. The number of orbitals in He+ ion having the energy = – 6.04 eV is
Key: 9
140. How many of the following elements react with Nitrogen directly to form a product
that liberates ammonia when treated with water.
Li, Na, K, Rb, Cs, Be, Mg, Ca, Sr, Ba, B, Al
Key: 8
141. How many of the following binary compounds exist in polymeric state in solid phase.
BeH2, MgH2, AlH3, AlCl3, SiS2, SiO2, Silicones, Silicate and born nitride
Key: 7
142. How many of the following species do not contain lone pair of electrons on the central
atom
Key: 8
143. The value of the de Broglie wave length of mono atomic Gas ‘X’ at 73 C is ‘M’
times that of the de Broglie wave length of mono atomic Gas ‘Y’ at 727 C . Find M?
(Given Molar masses of ‘X’ and ‘Y’ are in ratio 1:5)
Key: 5
144. The number of total isomers of biphenyl dichloride are X. Find the value of Y, where
Y= X-3 and fill in your response sheet
Key: 9
145. How many of the following are soluble in excess of NaOH -
2 3 2 2Ca OH ,Al OH ,Sn OH , Pb OH , 3 2 2 3Cr OH , Zn OH , Be OH ,Fe OH Key: 6
146. Number of equilateral triangle faces in truncated tetrahedron are_____
Key: 4
147. 2 3A B dissociates in 3A and 2B ions in an aqueous solution, with a degree of
dissociation ( ) 0.5 . The ratio of the observed elevation of boiling point of the
aqueous solution to the value of the depression of freezing point (hypothetical) in the
absence of ionic dissociation for the same molality is ‘R’. Find value of 8R?
2 2b(H O) f (H O)K 0.5,K 2 Key: 6
23 3 2 2 3 2 3 2 2 2 3, , , , , , , , , ,NO CO NO BO SO SO SO CO CS SiS BCl
148. Find out number of aromatic compounds or ion from following.
NH
OO
Key: 6
149. The purine heterocycle occurs mainly in the structure of DNA. Identify number of ‘N’
atoms having localized lone pair of electrons.
N
N N
NH
(Purine) Key: 3
150. How many resonating structures are possible for the compound?
O
(Furan) Key: 5
151. Find out number of compounds which have stable ionic structure, from following.
, , , ,
O O O
Key: 3
152. Find out number of benzylic hydrogen in....................
Key: 5
153. Number of maximum benzenoid structures which can be present in a particular
resonating structures of phenanthracene are ....................
Key: 3
154. Bromine and chlorine are taken in a container to attain the following equilibrium at
250C 2 2 2 ; 1pBr l Cl g BrCl g K atm . Initially 1 mole of Cl2 was taken and at
equilibrium partial pressure of BrCl is 0.1 atm. If vapour pressure of Br2 is 0.25 atm
then find minimum number of moles of Br2 required to attain this equilibrium.
Key: 5
155. 3Al OH is involved in two equilibrium given below.
3
3 3 pSAl OH Al OH K
3 4 CAl OH OH Al OH K
For minimum solubility of 3,Al OH OH concentration is given by
1z
sp
c
x KOH
y K
then find the value of ?x yz
Key: 1
156. When 2Be OH is evaporated with acetic acid, a compound ‘A’ is formed. If x=no. of
acetate ions in ‘A’ and y=no. of Be (atoms/ions) in ‘A’, then find x-y
Key: 2
157. Observe the compound ‘A’
Cl
OH OH If in this compound
a= total no. of chiral C-atoms
b= No. of optically active isomers
c = No. of optically inactive isomers
d = No. of geometrically orientations in space
Then find ?a c b d Key: 0
158. 1 gm of a mono basic acid (hypothetical acid) when dissolved in 100 gm of water
lowers the freezing point by 0.18540C. 0.2 gm of same acid when dissolved and
titrated required 20ml of 10N alkali. Calculate degree of dissociation (%) of the acid
2 1.8fK H O Key: 3
159. The concentration of cholesterol dissolved in chloroform is 6.15gm per 100 ml
solution. A portion of this solution in a 5cm polarimeter tube causes an observed
rotation of –1.20. if 10 ml of the solution is diluted to 20 ml and placed in same tube
then observed rotation is –m× 10-1. Find value of m=?
Key: 6
160. An electron and positron are orbiting about their common centre of mass. The
Rydberg’s constant for this system is Rnew while for hydrogen like species its R . Find
the value of ?New
RR
Key: 2
161. In 3 4LiCH , xc ye type bond is present between Li & ‘C’ or 3CH group then
value of |x-y| is-
Key: 2
162. Which of the followings are less soluble than KCl-
4 3 2BaSO , NaHCO ,LiCl,CsCl,LiF,Mg OH
Key: 5
163. Bronsted Basicity of aqueous boric acid is-
Key: 0
164. Number of stereoisomer of the following compound that has a different melting point:
CO2HHO2C
Key: 1
165. How many different chloroethanes are there from the formula 2 6 n nC H Cl (where n can
be any integer from 1 to 6)
Key: 9
166. Molecule [X] contains only carbon, hydrogen and a single oxygen atom. If [X] is a
ketone, what is the smallest number of carbon atoms needed for it to be chiral
Key: 6
167. A sample of hydrogen atom in ground state is irradiated by light of wave length0
970A .
Taking 6hc 1.237 10 eVm and the ground state energy of hydrogen atom is
– 13. 6 eV, the maximum number of lines present in the emission spectrum is:
Key: 6
168. The enthalpy of formation of 2 5C H OH( ) is – 66 kcal/mol. The enthalpy of combustion
of 3 3CH OCH (g) is – 348 kcal/mol. Enthalpy of formation of 2H O and 2CO are
– 68 kcal/mol and – 94 kcal / mol respectively. Then the H isomerisation of
2 5C H OH into 3 3CH OCH (g) is11x kcal / mol . The value of ‘x’ is:
Key: 2
169. The following rate data were obtained at 303 K for the following reaction.
A B C D
Experiment 1A / molL 1B / molL Initial rate of
formation of 1 1D / molL min
I 0.1 0.1 36.0 10
II 0.3 0.2 27.2 10
III 0.3 0.4 12.88 10
IV 0.4 0.1 22.4 10
Calculate rate constant of the reaction. (in terms of mol/L & min)
Key: 6
170. Air contains 2O and 2N in the molar ratio of 1:4. Calculate the ratio of solubility in
terms of mole fractions of 2N and 2O dissolved in 2H O at atmospheric pressure at
room temperature at whichHenry’s constant for 2O and 2N are 73.30 10 torr and 76.60 10 torr respectively.
Key: 2
171. Among the following reactions select those in which 20 halide is the major product?
A) 2Br /h
B)
CH3
2Br /h
C)
CH3
2Br /h D)
CH3
CH3 CH3
2Br / h
E) 2Br /h
F) CH3 CH32Br /h
Key: 3
172. Find the total number of isomeric products X in the following reaction and mark (X-5)
in your response sheet
Key: 7
173.
CH3
CH3
CH3
2Cl /hN(isomeric products) 5 11C H Cl fractional distillation M(isomeric products)
Find the value of M
Key: 4
174. How many transition states are involved in the following dehydration of alcohol.
OH
2 4conc.H SO /
Key: 5
175. CH3
CH3
OH
2D /PdH M N
Find the value of M+N?
Key: 8
176. Identify how many of the following reactions are correctly matched with their major
product.
A)
CH3CH3
mCPBA
Me
Me
OHH
OHH
B)
CH3 Et 2
4
BrCCl Et
CH3
Br
Br
C)
CH3CH3
HBrperoxide CH3CH3
Br
D) CH2CH3 CH3
Cl
HClperoxide
E)
CH3 CH3 CH3CH3H H
2 2CH IZn(Cu )
Key: 3
177. Number of reactions in which alkane is formed as major product:
A) 4LiAlH B) 4NaBHDMF
C) Cl
NaOEtEtOH D) 4NaBH
DMF
E) 3NaOH CaOCH COOH
F) 2 4 2 2/N H H O
Key: 5
178. 100 ml of 2 4/10M H SO , 200 ml of 2 3/ 5M Na CO and 150 ml of / 3M HCl are
mixed together . The number of mill moles of ortho-phosphorous acid ( 3 3H PO )
required to neutralise this solution (assume 1 for all participants in ionization
throughout)
Key: 5
179. A single electron system has ionisation energy in its ground state of -11808 kJ/mol the
number of protons in the nucleus of system will be:
Key: 3
180. Enthalpy of solution of anhydrous 4CuSO is -15.9kcal/mol and enthalpy of hydration
of anhydrous 4CuSO to form 4 2CuSO .5H O is -18.9 kcal/mol. Then the enthalpy of
solution of 4 2CuSO .5H O in kcal/mol is:
Key: 3
181. How many out of the following reactions, can give aromatic product?
1) S2CH CH M
Br
Br
Br
CH3 D
CH3 D
2) 2 2CH NCH CH N
3) Red HOtFe(or )Cu tube3CH CH O
4) m CPBACH CH P Key: 3
182. CaC2
H2OA
red hot iron873 K
B
O
O
OAlCl3
C(i) Zn-Hg/HCl
(ii) H3PO4W
Find the number of oxygen atoms in W.
Key: 1
183. Among the following, the number of aromatic compound(s) is
Key: 5
184. Examine the structural formulas shown below and find out how many compounds can
not give Friedel Crafts reaction.
CH3 NH2HO F
OHO3NH C N
, , , , , , ,
Key: 5
185. Examine the structural formulas shown below and find out how many compounds will
show side chain oxidation reaction with acidic 4KMnO
CH3 CH3CH3
CH3
CH3CH3
CH3CH3
CH=CH 2PhPh
Ph
C CH
, , ,
, , ,
Key: 5
186. In how many of the following pairs the former is more reactive than later with sodium
methoxide in methanol at 500C?
(i) Chlorobenzene and o-chloronitrobenzene
(ii) p-chloronitrobenzene and m-chloronitrobenzene
(iii) 4-chloro-3-nitroacetophenone and 4-chloro-3-nitrotoluene
(iv) 2-fluoro-1,3-dinitrobenzene and 2-chloro-1,3-dinitrobenzene
(v) 4-chloronitrosobenzene and 4-chloroanisole
(vi)2-iodo-1-(trifluoromethyl)benzene and 2-fluoro-1-(trifluoromethyl)benzene
Key: 4
187. Number of possible monochloro substituted products obtained from the reaction, of
3 32 2CH CH CH CH is,
Key: 3
188. A chloroderivative (X) on treatment with Zn-Cu couple in ethanol gives a
hydrocarbon (Y). When (X) is dissolved in ether and treated with sodium, 2, 2, 5, 5 -
tetramethylhexane is obtained. Identify how many different types of hydrogen atoms
are present in Y.
Key: 1
189. When 3,3 dimethyl 2- butanol is treated with HBr the number of 03 carbons present in
the major product formed is.
Key: 2
190.
CH3
If mono chlorinated through free radical substitution reaction, the total number of
possible isomers (Including stereo isomers) that can be formed for the above
compound is (X) which on fractional distillation gives (y) fractions. Find (x-y).
Key: 4
191. How many moles of AgNO3 will react with one mole of given compound?
Br
Br
Br
Br
Br
Key: 2
192. How many of the following are less reactive than CH3CH2I in a 2SN reaction?
(i) MeI (ii) CH3CH2CH2Br (iii) CH3CH2CH2CH2Cl
(iv) Me2CHI (v) Me2CHCH2I (vi) CH2 = CH–CH2I
(vii) PhCH2I
Key: 4
193. At room temperature how many of the following compounds can decompose 3NaHCO
to liberate 2CO ?
A) B) C) D)
E) F) G) H)
2CH C OH
OH
O
Key: 3
194. How many of the following compounds give Reimer-Tiemann reaction?
(a) (b)
CH2OH
(c)
(d) (e)
OH
CH3 (f)
OH
OH
Key: 4
195.
O
O
+
O
O
3 2
2
1. /2.AlCl CS
H O product mixture
How many compounds are exist in the product mixture?
Key: 4
196. The diazonium ions give diazo-coupling with phenol in the presence of dilute NaOH.
How many of the following are more reactive than Benzene diazonium chloride?
Key: 2
197. Number of bromine atoms in A are X, therefore X is
Key: 1
198. How many of the following ethers cannot be prepared by Williamson’s synthesis?
6 5 2 5 6 5 3 6 5 2 6 5 6 5 6 5
3 3 3 33 3, 3
, , , ,C H OC H C H OCH C H CH OC H C H OC HCH C O C CH CH C O CH
Key: 2
199.
2
2 2
FeH O
OH
3C H C lK O H
OHCHO
2 2(i) alkaline H O(ii)H X
The number of hydroxyl groups present in the product X is/are
Key: 2
200.
Number of moles of HI consumed per mole of (A) is X. Identify the value of X
Key: 0
201. 2 5
3
C H ClZnPhenol X YDust Anhydrous AlCl
(Monoalkylated product); the number of structural
benzenoid isomers of Y (including Y) are
Key : 4
202.
Five membered ring is major product then the sum of degrees of alcoholic groups
present in P is
Key: 4
203. An electrolysis of a oxytungsten complex ion using 1.10 A for 40 min produces
0.838 g of tungsten. What is the charge of tungsten in the material?
(Atomic weight: W=184)
Key: 6
204. How many of the following statements are correct?
A) cellE of any concentration cell is equal to zero.
B) In galvanic cell, electrons flow takes place from anode to cathode through external
circuit.
C) G of galvanic cell is temperature independent
D) Dilute 2 4H SO electrolysis between Cu electrodes produce 2SO at anode.
E) Cathode is negative electrode and anode is positive electrode in galvanic cell.
F) 1faraday electricity deposits 1 g-equivalent of a substance in the electrolysis.
G) Ions of inert electrolyte in salt bridge do not participate in electrochemical change
H) Cl2(g) and H2(g) are produced at anode and cathode respectively during
electrolysis of NaCl (aq) with Pt electrode
Key: 4
205. A cell 2/ / / /Cu Cu Ag Ag initially contained 2M Ag and 22M Cu ions in 1 L solution
each.The change in cell potential after it has supplied 1A current for 96500 sec was
found to be 210x V. Here x is:
Key: 2
206. If we assume the concentration of all the species as unity then at certain pH=0.2y the
emf values of both of the following two half cell reactions is same, then y (numerical
value) is __
3 2 ,NO NH OH (Acidic medium, 0 0.74E v ) and
3 2NO NO (Acidic medium, E0=0.80V) Key: 6
207. An alloy of Pb-Ag weighing 1.08 g was dissolved in dilute 3HNO and the volume
made to 10 mL. A silver electrode was dipped in the solution and the emf of the cell
set-up, 0( ) 2( ) ( )| (1 ) (1 ) ( ) 0.62 .s g s cellpt H atm H M Ag aq Ag was V If E is 0.80 V,
what is the percentage of Ag in the alloy? 0( 25 , / 0.06)At C RT F (Give your answer of
the multiplying with 10)
Key: 1
208. A solution containing 41M XSO aq and 41M YSO aq is electrolysed. If conc. Of X2+ is
10-z M when deposition of Y2+ and X2+ starts simultaneously. Calculate the
value of Z.
Given: 2.303 0.06RTF
2 20 0
| |0.12 ; 0.24
X X Y YE V E V
Key: 4
209. When a molten salt was eletrolysed for 5 min with 9.65A current, 0.18g of the metal
was deposited. Calculate the Eq. wt. of metal.
Key: 6
210. Current efficiency is defined as the extent of a desired electrochemical reaction
divided by the theoretical extent of the reaction. If this current efficiency fraction of
an electro deposition of Cu metal from 4Cu SO solution in which 9.8 g. Cu is deposited
by passage 3A current 10000 seconds is x? Give the nearest integer value w.r.t x?
Key: 1
211. A saturated solution of silver bromide is made in 7310 M AgNO solution
Given: spK of 133 10AgBr
3 2 16 10m Ag S m mol
3 2 13 7 10m NO S m mol
3 2 18 10m Br S m mol
For water, 6 17.5 10k S m
The conductivity of solution is x×10-7 S m-1. The value of x/20 is…..(adjusted to
nearest integer)
Key: 8
212. An aqueous solution containing 2 moles of NH4Cl is completely enclosed between
two electrodes which are 20cm apart, offers a resistance of 100 ohm. Calculate molar
conductance of NH4Cl(aq) (in S cm2mol-1)
Key: 4
213. Conductivity of a saturated solution of 2 6Cu Fe CN after subtracting the
conductivity of water is 5 1 11.28 10 cm . Calculate value of solubility of
2 6Cu Fe CN .
2 1 2 1 2 14 2 4 4 6260 , 300 , 720m m mCuSO S cm mol K SO S cm mol K Fe CN S cm mol
Report your answer as (solubility) x 510
Key: 2
214. The molar conductivity of aqueous solution of a weak acid HA is 200 S cm2 mol-1 and
its PH is 4. What is the value of pka of HA at 250C?
(Given: 0m (NaA) = 100 S cm2 mol-1 , 0
m (HCl) = 425 S cm2 mol-1, 0m (NaCl) = 125 S cm2
mol-1)
Key: 4
215. 0m (weak monobasic acid , HA) = 390.7 Scm2mol-1 . m of HA at 0.01 M = 3.907
Scm2mol-1 . Find PH of 0.01M HA.
Key: 4
216. Molar conductance of electrolytes varies with C generally as (I) or (II) as shown.
I
II
Mol
a r c
ondu
ctan
ce
C Among the following the number of species having similar graph as (II) is
COOH NH2
CH3COOH, KCl, HCl,
AgNO3, CH3COONa, Na2HPO3, H3PO4,
COO Na
Key: 4
217. In the given reaction , the number of isomeric products formed is-
CH3CHClCOOH + CH 3CHDOH H+
Ester(Racemic mixture) (optically pure
d-isomer) Key: 2
218. The number of compounds which liberates 2CO from 3NaHCO in the following is
OH
COOH CH3 COOH
COOCH3
NO2
NO2
SO3H
COOH
OH
OH
CH3 CH3
CH3
OH
O2N NO2
NO2
COOH
Cl Key: 6
219. The number of moles of 4LiAlH required to reduce 4 mol of RCOOH to 2RCH OH is
Key: 3
220. Total number of β- keto monocarboxylic acids (including stereoisomers) which on
heating give the following compound. O
CH3
Key: 6
221. Maximum number of moles of RMgX that reacts with one mole of following
compound COOH
O
O
CH3
ClOC
N
Key: 6
222. How many of the given compounds are monosaccharides.
Glucose Mannose Fructose Galactose Lactose Starch
(I) (II) (III) (IV) (V) (VI)
Cellulose Sucrose Maltose
(VII) (VIII) (IX)
Key: 4
223. How many of the given compounds are naturally occurring amino acids.
Alanine Valine Leucine Proline Methionine Tryptophan
(I) (II) (III) (IV) (V) (VI)
Glycine Serine Cysteine
(VII) (VIII) (IX)
Key: 9
224. How many of the compound form same osazone on treatment with Phenyl hydrazine.
Glucose Fructose Mannose Sucrose Starch Cellulose
(I) (II) (III) (IV) (V) (VI)
Lactose Maltose Galactose
(VII) (VIII) (IX)
Key: 3
225. A decapeptide (Mol. Wt. 796) on complete hydrolysis gives glycine
(Mol. Wt. 75), alanine and phenylalanine. Glycine contributes 47.0% to the total
weight of the hydrolysed products. The number of glycine units present in the
decapeptide is
Key: 6
226. How many of the given sugars are reducing sugar.
Key: 6
227. How many of the following metals can be purified by Electrolytic refining as well as
distillation process?
, , , , , , , ,Al Cu Ag Au Zn Hg Cr Pb Sn Key: 1
228. The number of oxides that can be reduced by carbon to give respective metals is 2 2 2 3 2 3 4, , , , , , ,Cu O SnO Fe O ZnO K O CaO PbO Fe O Key: 6
229. An Acidic impurity is removed from the gaseous emissions of coal fired power
stations by passing them through an aqueous suspension of mineral followed by
oxidation. Select the number of incorrect combination for these conditions
Acidic impurity Mineral Oxidized product / final product
1) 2SiO CaO 3CaSiO
2) 2SO 3CaCO 4CaSO
3) 4 6P O 2Ca OH 3 4 2
Ca PO
4) 3SO 3MgCO 4MgSO Key: 3
230. The No. of sulphide ores in the following is Cassiterite, Galena, Zinc blende, Azurite,
Siderite, Silver glance.
Key: 3
231. From the following , , , ,Ag Zn Sn Au Cu , number of metals present in anode mud of
refining of crude copper, are _ _
Key: 2
232. Of the following reduction process, number of the correct process are
i) 2 3Fe O C Fe ii) 3 4 2Ca PO C P
iii) ZnO C Zn iv) PbO C Pb
v) 3 WO C W Key: 4
233. Two important ores of metals are given below
Malachite 3 24. .CuCO Cu OH xH O
Carnallite 2 2. .KCl MgCl yH O
What is y – x?
Key: 6
234. How many statements are correct?
1) 6 2 6 PbSiF H SiF gelatine is taken as electrolyte in refining of lead
2) Ores are generally converted into oxide prior to reduction
3) In the extraction of Ag, 2Na Ag CN is reacted with Zn
4) In froth flotation process Na ethyl Xanthate is used as collector
5) Cu can be extracted by the reduction of CuSO4 with scrap iron in hydrometallurgy
6) Nitriding is a process of heating steel in presence of 2N or NH3 to form iron nitrides
Key: 6
235. Find the number of ions which are coloured in water?
4 3 2 2 2Ti ,Ti ,Co , Zn ,Fe
Key: 3
236. How many of the following orders are given correct?
1) Zn < Cu – Melting point
2) Cr < W – tendancy to form metal-metal bond
3) 3 3CrO WO - oxidizing power
4) Mn < Fe – Enthalpy of atomization
Key: 3
237. How many of the following metals can be extracted by carbon reduction (either from
chief ore or from low grade ores)?
Copper, Lead, Tin, Zinc, Iron, Silver, Aluminum, Molybdenum.
Key: 5
238. The spin only magnetic moment of transition metal ion found to be 5.92 BM. The
number of unpaired electrons present in the species is :
Key: 5
239. The oxidation state exhibited by the transition metal which is present in Ziegler-Natta
catalyst is _______
Key: 4
240. The number of transition metals in bronze is ' 'x , and in brass is ' 'y then x y is :
Key: 2
241. How many of the following compounds are diamagnetic? 2 4 2 2 4 2 3 2 4 2 5 2 7 2, , , , , .5 , , , ,K MnO HgI K CrO Cr O Ag O CuSO H O AgF CrO Mn O MnO Key: 6
242. How many complexes among the following are paramagnetic
3 3 326 6 3
236 26
2 33 32 42 4
, , ,
, , ,
, , .
Mn CN Cr H O Co en
V CO Ni NH Ni dmg
Pt Cl NH Cu NH Cu CN
Key: 5
243. How many complexes are less stable than 3
6Fe CN
32 3 3
3 3 246 6 6, , ,Co NH Fe NH Fe H OCu CN
Key: 4
244. The change in the number of unpaired electrons when 32 6[ ( ) ]Fe H O is changed into
36[ ( ) ]Fe CN is
Key: 4
245. NOCOx y zM CO NO M NO
Where EAN of metal M in both product and reactant is same and it is 54. Then
calculate value of x y z . (where x, y and z are natural numbers and M belong to 6th
group according to long form a periodic table).
Key: 1
246. No of incorrect statements are-
A) The bond between metal and carbonyl carbon reduces the bond order
of C – O in carbon monoxide
B) dz2 orbital of central metal atom / ion is used in dsp2 hybridisation.
C) CN is a -acid Ligand.
D) All negative ligands are stronger than neutral ligands.
Key: 2
247. Sum of optically active isomers of P, Q, and R are
P) 3 3Ma b Q) 2 2 2Ma b c R) 22M cAB
a, b and c are monodentate ligands while AB is unsymmetric bidentate ligand.
Key: 8
248. How many of the following statements is/are correct?
(A) The order of splitting energy is 2 2 24 4 4PtCl PdCl NiCl
(B)[Ni(CO)4] is diamagnatic whereas [Ni(H2O)6]2+ is paramagnetic.
(C) 2 24[ ( ) ]Ni CN dsp hybridized and paramagnetic.
(D) The magnetic moment of K3[Fe(CN)6] is 3 B.M
Key: 3
249. How many statements is/are correct for given complex 3
2 4 3Co C O
i) It contain negative ligands only
ii) The oxidation state of central metal atom is +3
iii) It is optically active
iv) Due to chelation the stability of the complex increases
v) It exhibit geometrical isomerism
vi) It is octahedral with d2sp3 hybridization.
vii) If one oxalate ligand is replaced by glycinate ion then it form two enantiomeric
pairs
Key: 5
250. The wave number of the radiation absorbed by 4
6CoCl is 18000 cm-1, then the
wave number of the radiation absorbed by 2
4CoCl is 3 110k cm . Then the value
of k is
Key: 8
251. Number of the following statements is/are correct?
(A) Greater the stability constant of a complex ion, greater is its stability
(B) Greater the oxidation state of the central metal ion, greater is the stability of the
complex
(C) CO stabilizes complex because of its synergic Bonding.
(D) Chelate complexes have low stability constants
Key: 3
252. Oxidation state of Cr in chromyl chloride is
Key: 6
253. How many of the following are yellow solids insoluble in water
2 3 4 3 2 2, , , , , , ,AgCl PbBr BaCO PbCrO AgNO CdS AgI Hg I
Key: 3
254. Total number of ‘d’ electrons present in the iron of brown ring complex is
Key: 7
255. The change in the oxidation state of iodine when excess of chlorine water is added to
an iodide salt is
Key: 6
256. How many number of statements given bellow are correct
1) Sulphate ion gives white precipitate with lead ion (Pb2+) soluble in ammonium
acetate due to formation of 34 42Pb CH COONH
2) 2PbCl insoluble in cold water but soluble in hot water
3) When 3AgNO reacts with 2NO white crystalline ppt is formed
4) AgI insoluble in 3NH aq solution
5) Ba gives yellow green colour to flame test
6) 2 3Ag CO upon heating produce melallic silver
7) Oxidation state of iron change from +2 to +3 in methylene blue test
8) Lead acetate insoluble in water
Key: 6
257. Among the following, the number of compounds that can react with 5PCl to give
3POCl is 2 2 2 2 2 4 4 10, , , , ,O CO SO H O H SO P O Key: 4
258. When titrated against a base a polyphosphoric acid gave end points at 30.4mL and
45.6 mL. Calculate the number of phosphorus atoms in the polyphosphoric acid.
Key: 4
259. How many of the species are paramagnetic? 2 2 2 2, , , , ,N O NO O NO NO CO
Key: 3
260. How many of the given chemicals liberates dinitrogen on heating
4 2 3 4 2 7 3 32 2 2, , , ,NH NO NaN NH Cr O Pb NO Ba N
Key: 4
261. How many species out of the following have reducing properties?
3 3 3 2 3 3 3 4 2 4 3 2, , , , , ,NH PH H PO H PO H PO N H Ca P Key: 6
262. In 5PCl , how many P Cl are inclined at 0120 with one each.
Key: 3
263. Number of chemical species having bond between nitrogen atoms
2 4 2 5 2 4 2 2 3 4 3, , , , ,N O N O N H N O N O asymetric NH NO
Key: 4
264. Number of metals that show passivity with conc. 3HNO among
, , , , , , ,Cr Fe Ni Cu Zn Al Ag Sn Key: 4
265. Find number of species which produce elemental sulphur when treated with 2H S : 3 2
2 2 2 3 3, , , , ,Fe Fe SO H O O HNO
Key: 5
266. How many of the following contain S-S linkage?
2 2 8 2 3 6 2 2 6 2 2 3, , , ,H S O H S O H S O H S O 2 2 7 ,H S O 2 2 4H S O Key: 4
267. How many S-O single bond linkages are present in peroxo disulphuric acid?
Key: 4
268. Number of molecules among the following having non-zero dipole moment is:
3 3 4 6 2 2 2 2, , , , , , ,O SO SF SF H S CS SO H O and 2 2H O Key: 6 269. Sum of total number of amphoteric and neutral oxides among the following is:
2 3 2 2, , , , , ,CO NO Cr O PbO PbO SnO ZnO Key: 7
270. How many of following statements are correct?
A) Engel’s sulphur contains 6S molecules
B) 2H S cannot be dried by using Conc 2 4H SO
C) 2H S on reaction with 2aq.SO can form colloidal sulphur
D) 2SO reacts with 2Cl in presence of charcoal to give 2 2SO Cl
E) 2SO acts as a bleaching agent in dry condition also.
F) Bleaching action of Ozone is due to it’s oxidizing action
Key: 5
271. The number of isomers possible for the molecular formula 6 10C H with terminal alkyne
group is (including stereo isomers)
KEY: 5
272. How many statements are true for the following pair of compounds?
C C
H H
Cis
C C
H
H
Trans (i) Dipolemoment of trans isomer is zero
(ii) Boiling point of cis isomer is more than trans isomer
(iii) Cis isomer is more stable than trans isomer
(iv) These are also called configurational diastereomers
(v) These are readily interconvertible under normal conditions
(vi) Melting point of trans isomer is more than cis isomer
(vii) Trans isomer is more soluble than cis isomer in polar solvents
KEY: 4
273. The number of geometrical isomers possible for the following compound is
CH2CH3
KEY: 8
274. obs i iX , where µi is the dipolemoment of stable conformers and Xi is the mole
fraction of those conformers of Z-CH2-CH2-Z. If µobs is 1Debye and molefraction of
antiform is 0.8, the dipolemoment of Gauche form is?
KEY: 5
27 5. Identify number of compounds that can show geometrical isomerism.
KEY: 4
276.
Value of “X” is……
KEY:5
277.
No of stereoisomers possible for unsaturated compound is (including the
product)……
KEY:4
278. In how many reactions, product is formed through cyclic transition state?
CH2
CH3
CH3
CH3
H B
CH3
CH3
CH3CH3
solvent"X" no of primary alcohols
excess H2O2
OH-
CH3 Et
1 eq. cold.dil.alk.KMnO4
Unsaturated compound .
CH2 CH21.Hg(OAc)2,H2O
2.NaBH4
CH3COOHB(CH2CH3)3
KEY:7
279.
Alkyne(C6H10)HgSO4
H2SO4
only one ketone
No of structural alkynes possible for alkyne which can satisfy the above reaction is…
KEY:5
280. Napthalene has three canonical kekule structures. Assume that each structure is
subjected to reductive ozonolysis.
Maximum no of atoms that can lie on a plane for molecule “A” is “X”.
Maximum no of atoms that can lie on a plane for molecule “C” is “Y”.
Then |X-Y| value is…
KEY:2
281. Nitrogen bases are given below.
CH2 CH2Br2
CH2Cl2
CH2 CH2NBSH2O
CH2 CH2O3
CH2Cl2
CH2 CH2NeutralKMnO4
CH2 CH2
CO3H
Cl
Most stable canonical form reductive ozonolysis A + B (mol.wt: A > B)
Least stable canonical form reductive ozonolysis C + D (mol.wt: C > D)
No of electrons in the most basic compound is….
KEY:6
282.
Then |X-Y| value is…
KEY:5
283. How many of the following intermediates have at least one contributing structure in
which all atoms have their octet complete?
O
NCH3CH3
O
OCH3
NO2
, , , , ,
KEY:5
284.
CH3
CH3
1 eqHBr Product.
No of allylic hydrogens in thermodynamic product is “X”
No of vinylic hydrogens atom in kinetic product is “Y”
The value of |X-Y| is….
NH
NH
N N
NH2
CH3 NH2
ONCH3
N
NH
O
O
CH3CH3
Non aromatic compound.
Excess of H2/Pd Cl2hν
"X" no of mono chloro Fractional distillationproducts "Y" fractions
KEY: 5
285. No of stereoisomers possible for the following compound is
Br
Br Cl KEY:4
286. No of carbon atoms in the principal carbon chain of the following compound is
(Consider IUPAC name)…
CH3
OH
O H
CH2
OH KEY:5
287. The value of “X” in the following reaction is…..
1.NaH2.CH3COOD
*
*" X " no of deutarated produt(s)
* indicates isotopic carbon atom KEY:3
288. How many of the following molecules will give 2,3,5-trimethylhexane on heating
with sodalime?
CH3
CH3 CH3
CH3HOOC CH3
CH3
COOHCH3
CH3 CH3
CH3
CH3 CH3
COOHCH3
CH3
CH3
CH3 CH3
CH3
COOH
CH3
CH3
CH3 CH3
CH3COOH
CH3
CH3
CH3
CH3
HOOC KEY:5
289. In the following reaction, consider the most stable conformer of final product. This
conformer has only one plane of symmetry. No of atoms lie on that plane is….
Cl
Cl
Naether
H+,Δproduct(non polar molecule)
KEY:6
290. Locant of halogen ((Consider IUPAC name)) in the final product is……
CH CH CuCl
NH4Cl2 1 eq
HClMe2CuLi 1 eq.HBr Major product
KEY:1
291. No of meso products formed in the following reaction is…
CH3CH3
CH3 CH3
Excess of Br2
CCl4possible tetrabromoproducts
KEY:0
292. How many out of the following compound (s) can not contain benzene ring?
10 16C H , 8 6 2C H Cl , 5 4C H , 10 15C H N
KEY:2 293. How many structure(s) out of the following are aromatic:-
O
BH
NH O
, , , , ,
KEY: 5
294.
Me
Et Br
alc.KOHΔ
9 16
Elimination product(s)C H
How many product(s) will be formed?
KEY:4
295. How many out of the given statement(s) is (are) correct-
i) Phenyl group is known to exert negative inductive effect, but each phenyl ring in
biphenyl 6 5 6 5C H - C H is more reactive than benzene towards electrophilic
substitution.
ii) 7-bromo-1,3,5-cycloheptatriene is ionic compound whereas 5-Bromo-1,
3-cyclopentadiene can’t ionise even in the presence of Ag
iii) CH3
BrCH3
2 5C H OH(aq) acidicsolution
iv)
NaOH(aq) F liberated
F
CH3
O2N
v)
NaOH(aq) F is not liberated
F
CH2NO2
CH3
KEY:5
296. Find the total number of feasible products (including stereoisomers) in the following
reaction. (No carbocation rearrangement is observed)
4
HBrCCl
KEY:4
297. Find the total number of monobromo products obtained during the reaction-
CH
CH3
CH2
NBSh
KEY:4
298. Find the total number of optically active products obtained in the following reaction-
Me
D
CH.D.Cl
H 2
NaEt O
KEY:3
299. The total number of resolvable and non-resolvable racemic mixtures (pairs) possible
with molecular formula 4 11C H N KEY:3 300. X is the number of structural isomers which gives isocyanide test (consider all
primary amines) and Y, which do not give isocyanide test with M.F - 8 11C H N (All are
benzene derivatives) Then X-Y (difference) is
KEY:8
301. In how many of the given compound nitrogen atom may be removed as trimethyl
amine by repeated Hofmann eliminations (exhaustive methylation followed by heating
with AgOH )?
A) N B)
N3CH
C)
3 2( )N CH
D)
N3CH
KEY:4
302. The number of moles of electrons involved in the reduction of one mole of
nitrobenzene by Sn-HCl is
KEY: 6
303. How many moles of HI can react with 1 mol of the following compound?
CH2
OCH3
OH KEY:2
304. The total number of aldehyde & ketone isomers possible for C5H10O are_____
KEY:8
305. The total number of enols possible for the formula C4H8O are ___
KEY:6 306. A carbonyl compound of formula C9H10O(A), which is a benzene derivative gives
orange precipitate with 2,4 -D.N.P and also gives yellow precipitate with I2 in
presence of aqueous NaOH. The total no. of isomers possible for ‘A’ are______
KEY:3
307. In how many of the following reactions aldehyde is formed as product?
i) O
O-78ºCDIBALH ,
ii) OH
300ºCCu ,
iii)
OH
ii)i) 3 /CHCl KOH
3H O
iv)
3 3, /H C COCl AlCl
v)
3CH
2, ,CO HCl ZnCl
vi)
3CHOC
O
3 2, ,AlCl CS
vii) OH
2 2PDC,CH Cl
Viii) OH
3 2,CrO AC O
KEY:6
308.
H
O
HCN m 2HCl H O n
(No.oforganic products)
(No.oforganic products)
m+ n is_____
KEY: 4
309. Find the number of compounds which on reaction with 4LiAlH followed by treatment
with water give optically inactive compound?
I
O O
CH3
II CH3
CN
III
O
O
IV
OCH3
CH3
O
V
O O
CH3
O
VI
Cl H
O
CH3
O
KEY: 5
310. How many of the following are classified as LINEAR polymers?
LDPE, PVC, amylopectin, cellulose, melamine, nylon 6, isoprene and polystyrene
KEY:4
311. How many of the following undergo Hoffmann bromamide rearrangement?
Benzamide, DMF, Aniline, N-methyl ethanamide
KEY:1
312. Identify the no of pairs which are correctly matched?
Polymer Molecular formula/ representation of repeating unit
Nylon 6 2 5[ ( ) ]CO CH NH
PET/Terylene 10 8 4[ ] C H O
PVC 2 3[ ] C H Cl
Neoprene 2 2[ ( ) ]CH C Cl CHCH
KEY:4
313. How many of the following amino acids when fused with sodium followed by
addition of aq. sodium nitroprusside give purple colour solution?
Arginine, Lysine, Serine, Aspargine, isoleucine, Tyrosine
KEY:0
314. A decapeptide of molecular weight 796g/mol on hydrolysis gives glycine, alanine and
phenyl alanine, of which glycine contributes 47% of the hydrolysed products by
weight. What is the number of alanines in the decapeptide?
KEY:2
315.
CH3 COOH ANaCN
BH3O
+
C
red P / Cl2
(C7H7O2N)
If the difference in molecular weights of reactant and final product is X, then X/4=?
KEY:0
316.
CH3COOEt
O
EtO-/EtOH
OA
HBr
Bromo ketone
5 9(C H OBr)
What is the sum of locants in IUPAC system of naming for the final product formed?
KEY:7
317. How many reactions occur as shown in the forward direction under appropriate
conditions?
(I) O
OHH
HH
OHOH
H OH
H
OH
CH3I (excess)
Ag2O
O
OMeH
HH
MeOOMe
H OMe
H
OMe
(II) CH3 COOH
NH2
CH3
Ac2OCH3
COOH
NHCOCH3
CH3 (III)
CH3
D
H OH + Cl
O
NO2NO2
COO CH3
D
H
(IV) OH
COOH
Ac2OAspirin
KEY:3
318. How many of the following statement(s) are correct?
(i) 5 moles of Formic acid decolourises 2 moles of acidified solution of 4KMnO
completely
(II) amino acid and hydroxy acid behave in a similar way when heated
(III) When 2 moles of potassium acetate is electrolysed 1 mole of gaseous products is
obtained at cathode under ideal conditions assuming 100% efficiency and no side
reactions
(IV) Glucose pent acetate doesn’t form 2,4-DNP derivative
(V) D-glucose reacts with 2NH OH.HCl to form a diastereomeric pair of glucose
oximes
KEY:5
319. Isothermal compressibility of an ideal gas is defined as ,
1
T n
dvkv dp
what is
isothermal compressibility for an ideal gas at 1.0atm.
KEY:1
320. Certain amount of gas confined in a piston-filled cylinder is heated from 027 C to 0127 C keeping its pressure constant and gas expanded against constant pressure
doing 4.157kJ of work on surroundings find the number of moles of gas present in
cylinder.
KEY:5
321. Number of extensive physical properties is
density, viscosity, emf of drycell, surface tension, molarity, dipolemoment, molar heat
capacity, refractive index, vapour pressure, molar entropy change.
KEY:0
322. If 0 ,fH MgCl s is -125 KJ/mole, 02,fH MgCl s is -642 KJ/mole the enthalpy of
disproportionation of MgCl is -49X to form one mole each of 2MgCl and other
feasible product. When X is ____
KEY:8
323. At constant volume of 0.0821 litres for an ideal gas if 300d PTdT
at 150K. The
number of moles of that gas is____
KEY:1
324. 50ml of a liquid (vapour pressure 8cm at 300K) having density 2.2g/ml is placed in a
container of 4 litres at 300K. It is connected to another empty container of 4 litres at
300K. The resultant pressure inside the vessel at same temperature in cm is______
KEY:8
325. Number of correct statements of the following
A) The gas on subjecting to joule Thomson effect gets heated if its temperature is less
than its inversion temperature
B) At equilibrium, where properties of a system no longer change, the entropy of
system will be zero.
C) Gaseous molecular suffer no energy loss due to friction
D) Speed distribution of 2O at Tk is same as for 2SO at 2Tk
E) Energy can be transferred between gaseous molecules during collisions but RMS
velocity remains constant at given temperature
F) The compressibility factor for 2N at 050 C and 800atm pressure is 1.95. The
moles of 2N required to fill up a balloon of 100litres capacity is 32.24 10 .
G) If is mean free path then T at constant P and 1p
at constant T for ideal
gases
H) Mean free path varies inversely with the number of molecules per unit volume of
gas.
I) A gas described by vander waal’s equation behaves similar to an ideal gas in the
limit of larger molar volumes.
J) Increase of pressure decrease melting point of solids showing compression on
fusion and increase the melting point of solids showing expansion of fusion.
KEY:8
326. Equimolar mixture of two gasesX2 and Y2 is taken in a rigid vessel at temperature 300
K. The gases reacts according to given equations
12 2 PX X Kg g
22 2 PY Y Kg g
32 2 2 2PX Y XY Kg g
If the initial pressure in the container was 2 atm and final pressure developed at
equilibriums 2.75 atm in which equilibrium partial pressure of gas AB was 0.5 atm,
calculate the ratio of 2
1
P
P
KK
?
KEY:8
327. Compound C is a gas at room temperature, but not stable and decomposes to yield the
gases I and J:
g g gC I J Kc = 3.203
Compound J dimerises to give gas M:
2 g gJ M Kc = 6.807
One mol of compound C were evaporated in a flask with a volume of 1L at room
temperature. After establishing the equilibrium, 0.3530 mol of substance M were
generated. % of the original compound C are present in this equilibrium is X/3. Value
of x/3 adjusted to nearest integer is
KEY:2
328. What is ratio of moles of 2Mg OH to 3
Al OH in 1 litre of their saturated solution (
SPK of –122
Mg OH 4 10 and SPK of –333
Al OH 1 10 ) Give answer by multiplying
the ratio with –1710 .
KEY:8
329. How many gm of solid NaOH must be added to 100 ml of a buffer solution which is
0.1 M each with respect to acid HA and salt NaA to make the pH of solution 5.5.
Given 5akp HA (Use antilog (0.5) = 3.16)? Adjust your answer to nearest integer
and report your answer after multiplying with 10.
KEY:2
330. Calculate the percent error in the [H3O+] concentration made by neglecting the
ionization of water in 10-6 M NaOH solution.
KEY:1
331. Silver is electrodeposited on metallic vessel of total surface area 2500cm by passing a
current of 0.5 amp for two hours the thickness of silver deposited is qP 10 cm (in
scientific notation).
[Given: Density of silver = 310.5g cm , Atomic mass of silver = 108 amu,
F = 96500 1Cmol ] Find the value of q?
KEY:4
332. Resistance of a conductivity cell filled with 0.1 M KCl solution is 100 ohm. If the
resistance of the same cell when filled with 0.02M KCl is 520 ohm. The molar
conductivity of 0.02 M KCl solution is 4 2 1P 10 Sm mol . Given conductivity of 0.1 M
KCl solution is 11.30Sm . Find the value of P before the decimal point?
KEY:1
333. Number of moles of 4KMnO required to oxidise 10 moles of 2 4Fe C O in acidic
medium is ‘q’.. Suppose molecular weight of 2 3As S is ‘M’ and the equivalent weight
of 2 3As S in the reaction 3 22 3 3 2 4 4As S H NO NO H O AsO SO is
14M
p.
Then q – p = ______
KEY:4
334. V ml of aq solution of 2 4KHC O . 2 2 4H C O . 22H O required 20 ml of M/20 2Ca OH
solution for neutralization. If same volume of given solution required x ml of M/15
4KMnO solution in acidic medium, find value of x?
KEY:8
335. The potential of Pt, Hg(l) | Hg(I) nitrate (0.01M)|| Hg(I) nitrate (0.1M)| Hg(l), Pt is 2y 10 V.(in scientific notation). Find the value of y to the nearest integer?
KEY:3
336. 10% sites of catalyst bed have been occupied by H2. On heating H2 gas is evolved
from sites and collected at 0.03atm and 300 K in a small vessel of 2.46 cm3. No. Of
sites available is 156.0 10 per cm2 and surface area is 1000 cm2. The number of
molecules of H2 adsorbed per site of catalyst is (Given 236 10AN )
KEY:3
337. 100 mL of 0.6M acetic acid is shaken with 2g activated carbon. The final
concentration of the solution after adsorption is 0.5M. What is the amount of acetic
acid adsorbed per gram of carbon? (Give your answer after multiplying with 10)
KEY:3
338. Consider the arrangement of circles of equal radii with their centres arranged as per
the 2-dimensional lattice defined by a = b, = 60° such that each circle is touching all
its nearest neighbours. If all the void areas present are additionally occupied by
smaller circles of relevant size so that the void circles are just contacting their
neighbours. Find the packing efficiency of the configuration in percent. (Give your
answer as 100 – value)
KEY:5
339. An ionic solid 2AB isomorphous to the rutile structure (a tetragonal system with
effective number of formula units =2) has edge lengths of the unit cell are 0 0 04 ,4 5A A and A . Calculate the density (in mg/cc) of the substance if its formula
weight is 81. Take 236 10AN and the answer is 4000 -5n. Give the value of n.
KEY:4
340. Ionic solid B A crystallizes in rock salt type of structure. 1.296 gm ionic solid salt
B A is dissolved in water to make one litre solution. The pH of the solution is
measured to be 6.0. If the value of face diagonal in the unit cell of B A is 600 2 pm.
calculate the density of ionic solid in gm/cc.
5 23298 10 6.0 10bT K K for BOH is Avogadro Number KEY:4
341. White phosphorus disproportionate in concentrated NaOH and gives PH3 and
NaH2PO2. The sum of stiochiometric coefficients of reactants in the balanced red-ox
reactions is _________
KEY:7
342. The minimum number of moles of potassium chlorate required to decompose to give
sufficient oxygen for complete combustion of 22.4l of C2H4 at STP are_____
KEY:2
343. The velocity of electron in one of the Bohr orbits of hydrogen atoms is 0.55 × 106 m/s:
The orbit number is _______
KEY:4
344. The potential with which an electron is accelerated to possess a wavelength of 6.13Aº
is _____ volts.
KEY:4
345. Maximum number of electrons present in a p-orbital are _______
KEY:2
346. Find the number of correct statements about azeotropic mixture
1. When a sizeable deviation from ideality occurs, the boiling point curve for a binary
mixture may exhibit a maximum or minimum.
2. Mixtures having maximum or minimum boiling point are known as azeotropic
mixture.
3. These mixture distil without change in composition
4. It follows that, at a given pressure, the maximum separation that can be achieved by
fractional distillation is to azeotropic mixture and one of the pure component.
5. The azeotropic composition may vary significantly with applied pressure.
KEY:5
347. A man weighing 80 kg was injected with 5 ml of water containing tritium showing
activity of 111.08 10 dpm . After 5 minutes when the sample is distributed uniformly
within the body water of patient, a 1.0 ml sample of body water showed an activity of 43.0 10 dps . Estimate the weight percentage of water in the human body. Neglect any
change in volume of water in the human body during the observation period and take
the density of water as 31000kg / m . (Half life 31H is 12.3 years). Suppose your answer
is xy% then represent it as x – y.
KEY:2
348. Equal mass of A & B present in liquid solution then total pressure exerted by vapours
is X torr. Give X/6. [A = 80 gm/mol, B = 120 gm/mol]
KEY:6
349. In a sample of sodium, ratio of it’s isotopes of 24 23Na & Na is 101.8 10 :1 . If 69 gm of
such sample is taken and found to have activity of 54 Rd. then half life of radioisotope 24Na (in minutes) is. (Take: 23
AN 6 10 , ln 2 0.7 ). Represent the answer in scientific
notation at yx 10 and find the value of x-y.
KEY:3
350. A 3.42% w/v solution of cane sugar has undergone partial inversion according to
following equation 12 22 11 2 6 12 6 6 12 6C H O H O C H O C H OGlucose Fructose
If osmotic pressure of solution is atm at 300 K temperature after 400 min, then
calculate the value of 2.1
Given: Angle of rotation 20 50 80
Time (min). 100 300
R = 1 10.08atm litre mol K
KEY:2
351. How many of the following is correct regarding bond angle?
(i) 3 3NH H O
(ii) 2 2F O H O (iii) 2 2SCl OCl (iv) 2 2H S H O
(v) 2 2NO NO (vi)
3 3C H CH
(vii) 3 4NH CH (viii)
4 3B F BF
KEY:8
352. How many orders are correct match?
(i) Boiling point: PH3< AsH3< NH3< SbH3
(ii) Dipole moment: CH3F > CH3Cl > CH3Br
(iii)Bond angle: OF2<H2O < OCl2
(iv)Solubility: BeSO4> MgSO4> CaSO4> SrSO4> BaSO4
KEY:3
353. The ratio of lone pairs between 4AlCl and 2CO is
KEY:3
354. Out of 3 2 2I , ICl ,BeCl , 52 6XeF ,XeF ,BrF ,HC CH .How many will have linear shape?
KEY:5
355. Amongst the following the total number of the compounds i.e oxide soluble in
aqueous NaOH is 2 3, , , , , , ,Al O ZnO SnO PbO CuO BeO BaO CaO
KEY:5
356. How many of the following metal chlorides impart characteristic colour to the
oxidizing flame? 2 2 2 2 2, , , , , , , ,LiCl NaCl KCl RbCl BeCl MgCl CaCl SrCl BaCl
KEY:7
357. How many of the following nitrates of metal ‘M’ decompose on heating similar to as
given below in the scheme? (where; , , , , , , , ,M Li Be Mg K Ca Sr Na Rb Ba )Metal nitrate heatmetal oxide + nitrogen dioxide +oxygen gas
KEY:6
358. The decahydrate form of sodium carbonate i.e., washing soda on standing in air
effloresces to powder. The number of water molecule (s) present in the compound
formed is
KEY:1
359. 2X ions adopt the following arrangement in which only tetrahedral voids are occupied
by the ions of a metal “M”
If 0.01 moles of the smallest repeating units of the above arrangement are present in
“800 ml” aqueous solution, the reduction potential of the metallic electrode is 0.44 V
(S.R.P of metal electrode = 0.5 V) 1 Find the number of tetrahedral voids
occupied by metal ions in that arrangement
KEY:8
360. An equimolar solid mixture of 3 3,AlCl FeCl and 3CrCl is washed with a buffer solution
of pH = 8. After precipitates are removed the maximum possible ratio of any two
trivalent ion concentrations in the solution is 10yx . What is y x ?
34 39 313 3 3
values : Al 2 10 , 4 10 , 2 10sp OH Fe OH Cr OHK
KEY:2
361. H2S is passed through an aqueous solution containing Cu2+, Cd2+, Hg2+, Ba2+, Al3+,
Mg2+, Zn2+, Ni2+, Mn2+, Co2+ and Bi3+ in presence of dil. HCl. The number of ions
which are precipitated as sulphides is
KEY:4
362. The total number of isomers expected for 2
2 2Pt NCS en
is ……
KEY:9
363. Among 2 3 2 3 6 4, , , , ,H S PH H O NH SF XeF , the number of compounds which have bond
angle nearly 90 is
KEY:4
364. Among the following, the number of compounds, which can participate as ‘diene’
component in a Diels-Alder reaction is __.
KEY:6
365. The number of reducing sugars among the following is
KEY:3
366.
O
NH
O
How many of the following reagent(s) used for the above synthetic transformation
I) a) 2 / ,NH OH H b) 2 4H SO
II) 3 /HN H
III) a) 2 / ,NH OH H b) NaOH
KEY:2 367. Total number of possible isomers for the complex having empirical formula
3 2.6CrCl H O KEY:4
368. The number of sigma bonds in Ziese’s salt is
KEY:8
369. For how many of the following the weight increases in the applied magnetic field.
2 2 4 2 4 4 4 46, , , ( ], , , , , NO NO O K Fe CN KO MnSO NiSO CuSO ZnSO
KEY:8
370. FeSO4 reacts with excess KCN solution to form a complex then the no. of unpaired d-
electrons present in the central atom of that complex is
KEY:0
371. In how many of the following compounds the experimental lattice energies or
hydration energies will be more than the calculated lattice energies or hydration
energies
2 2 2 2 2 2 2 3 2 3 2, , , , .6 , .6 , .6 , .6NaCl FeF NiF CuF MnCl H O ZnCl H O FeCl H O TiCl H O
KEY:4
372. The magnetic moment of the complex compound 2 6 6Fe H O Fe CN in which iron
atom in both cation and anion is in same oxidation state is
KEY:7
373. The number of chloride ions coordinated to Fe3+ ion in anhydrous iron (III) chloride.
KEY:6
374. How many of the following compounds can be recovered by evaporation from their
aqueous solutions 2 2 2 4 3 4, , , , , , ,NaCl BeCl MgCl CaCl CuSO FeCl SnCl AgCl
KEY:4
375. In how many of the following reactions, reagents are wrongly chosen?
i)
25ºHBr
C
Br ii)
3
2 2
) /) /i BH THF
ii H O O H
OH iii)
2
2 4
H OH SO cat
OH
(only product)
iv)
2MnO
HO O
v)
3Al O tA
O
H
O
O vi)
3
2
))i O
ii H O +O
H
O vii)
2
4
HPd BaSO
H H
viii3Na in liquid NH
MeOH
H H
ix)
3
3
) /)i BD THF
ii CH COOH
D
KEY:5
376. A reaction takes 10 min for 10% completion at 27ºC . The time taken for the reaction
for 10% completion at 47ºC is nearly ___ min
1 1 23.03 . / 2 activationE K cal mole R cal K mol
KEY:1
377.
Cl
KOH alcohol m
(no.of organic prodcuts)
2
4
Br excessCCl n
(no.of organic prodcuts)2E
m+n value is _______
KEY:8
378. The potential of the cell
0.1
0.2
M BCl
M BOH
2Cu
2,pt H 1M 1atm
Cu
is 0.88 V at 25º C . BOH is a weak base & 2
0|Cu Cu
E is 0.34 V. If 20 ml of 0.1M BOH is
titrated with 0.1M HCl, the pH at equivalence point is_____
KEY:5
379. The RMS velocity at 1T K and most probable velocity at 42 4 7.9 10 /T K of CH is cm s .
If T2 is 210x K , what is the value of ‘x’?
KEY:6
380. If heated in water, borazine hydrolyses slowly. The total number of moles of gaseous
products obtained by hydrolysis of one mole of borazine is:
KEY:9
381. How many of the following combinations results in liberation of hydrogen gas?
(i) Al, NaOH
(ii) Ga, NaOH
(iii) 2 6 2B H ,H O
(iv) 2 6 3B H , NH (1: 2) / 200 C
(v) Electrolysis of aqueous 3AlCl
KEY:5 382. The difference in coordination numbers of Al in crystalline 3AlCl and vapour 3AlCl
~ 200 C is:
KEY:2
383. Among the following hydroxides the number of white precipitates is:
2 2 2 3 2 2 2 3 2Zn OH , Cd OH , Mn OH , Al OH , Ni OH , Co OH , Pb OH , Fe OH , Cu OH KEY:5
384. A sodium salt (V) gives a brown coloured gas with dil HCl and forms a brown
coloured complex with ferrous sulphate and acetic acid. With how many of the
following reagents, the salt (V) produces a gaseous product?
(i) with 4KMnO in acidic medium
(ii) boiling with 4NH Cl
(iii) with urea in presence of dil HCl
(iv) with sulphamic acid in presence of dil HCl
KEY:3
385. The number of sulphide minerals in the following is
Cuprite, Sphalerite, Carnallite, Calamine, Pyrolusite
KEY:1
386. How many of the following reactions occur during calcination.
3 2CaCO CaO CO
2 3 2 2 3 2.2 2Al O H O Al O H O
3 4 2 33 8 4 9Mn O Al Al O Mn
2 22 3 2 2ZnS O ZnO SO
2 42ZnS O ZnSO
KEY:2
387. Among Zn, Cd, Cu, Sn, Ge, Pb, Au and Bi, no. of metals refined by liquation is
_____.
KEY:3
388. Howmany of the following metals are found in native state?
Ag, Pb, Fe, Pt, Mg, Au, Cu, Al, Zn
KEY:3
389.
6 21
2 ,mole
XeF H O A HF ‘A’ has ' 'x bonds, y bonds and z lone pairs on Xe
atom x y z is
KEY:7
390. During extraction of copper, Matte contains A + B, the oxidation state of the metals in
A and B are ' 'x and ' 'y . x y is
KEY:3
391. Among the following number of compounds that have zero dipole moment
1) 2XeF 2) 4XeF 3) 2 2XeO F
4) 3XeO 5) 4XeO 6) 4XeOF
7) 2KrF
KEY:4
392. When a compound of xenon and fluorine is completely hydrolysed, HF is formed as
one of the products and no paramagnetic gas is produced.
The number of fluorine atoms present in one mole of that xenon fluoride is:
KEY:6
393. How many d p bonds are there in XeO4?
KEY:4
394. What is the total number of lone pair of electrons present in Xe in XeF2?
KEY:3
395. What is value of n (the number of negative charges) on the cyclic anion 4 12nSi O
KEY:8
396. What is the number of moles of R Mg X (Grignard reagent) required in the
formation of one mole of smallest cyclic silicone.
KEY:6
397. In how many of the following reactions carbon monoxide is one of the product.
i) 4 2 46FeK H SOCN conc
ii) 2 2 4 2 4H C O H SO conc
iii) 2 4HCOOH H SO conc
iv) ZnO C
v) 2CO C
vi) 2H O C
vii) 2CaNCN H O
viii) 2 4H SO C
ix) 2 4red hotNa SO C
KEY:7
398. How many metals of the following liberate NO gas with 20 % dil 3HNO
, , , , , , , Cu Fe Sn Zn Hg Pb Ag Au
KEY:4
399. Find the number of oxoacids which on heating produces one of the product having
lowest oxidation state of underlined atom.
3 2 3 3 4 3 3 2
4 4 3 4 2 2 74 2
H PO H PO H PO H PO PbO
PbCl NH NO NH NO Cr ONH
KEY:4
400.
OH
H / Possible products(x) 2 4Br /CCl (y) productsThen, x y is
KEY:8
401. The electron in the first excited state 1n 2 of H-atom absorbs a photon and is
further excited to nth shell. The de-Broglie wavelength of the electron in this excited
state is 1340 pm. Find the value of n.
KEY:4
402. The number of moles of NaOH required to react with gaseous products of the
following reaction:
4
hot,acidicKMnO
KEY:8
403.
In above figure, the gas filled in this bulb is subjected for the combustion of 10 moles
of 4CH . Maximum number of moles of 2CO formed in this process is 2. The volume
of the bulb is "11.2 x" litre at 280K. Find the approximate integer value of x.1 1R 0.08lireatm mol K .Atmospheric pressure 1atm
KEY:4
404. The total number of lone pairs of electrons in nitrogen containing product obtained by
heating ammonium nitrate at about 250 C is:
KEY:4
405. 16 moles of 2H and 4 moles of 2N are sealed in one litre vessel. The vessel is heated at
constant temperature until the equilibrium 2 2 3N (g) 3H (g) 2NH (g) is established; it
is found that the pressure in the vessel has fallen to 9 th10
of its original value (P atms).
Now 'x' moles of an inert gas is added at constant volume to the equilibrium mixture
till the original pressure (P atms) is attained. The value of 'x' is?
KEY:2
406. An emission is 3Be in observed at 02.116A . In which orbit is it placed?
Key :4
407. All the four blocks and four types of elements are present in the period
Key :6
408. No. of possible ionisation potentials for carbon are
Key :6
409. Vander waal’s radius is 10 %x more than covalent radius. What is x
Key :4
410. An oil drop has 196.39 10 coulomb charge. The number of electrons in the oil drop
is
Key :4
411. Find the ratio of energy of a photon of 02000A wavelength radiation to that of 04000A radiation is.
Key :2
412. What is the total number of radial and angular nodes present in 5f orbital?
Key :4
413. The orbital angular momentum of 3p electron is 2hx
. Then the value of x is
Key :2
414. Principle quantum number of the shell to which the g – subshell first arise is
Key :5
415. In an atom, the total number of electrons having quantum numbers 14, 1n m and
12sm is
Key :6
416. The number of p d bonds in 4XeO is
Key :4
417. How many of the following compounds having odd number of electrons:
2 2 2 2 2 4 2 5 2, , , , , , , ,Cs O MgO Cl O ClO NO NO N O N O CaOCl
Key :3
418. Total number of covalent bonds between carbon and carbon atoms in 3 2C O molecule is
Key :4
419. The total number of lone – pairs of electrons in the following compound is
N N
H
H H
H
Key :2
420. The number of sigma bonds in tetra cyano ethylene is
Key :9
421. What is the total no of pairs of electrons at least three quantum numbers for Be____
Key :4
422. The sum of the number of lone pairs of electrons on each central atom in the following
species is 26 2 3 3, ,TeBr BrF SNF and XeF
Key :6
423. How many of the following species have bond order of 2.5
1) 2N 2) 2N 3) 2O 4) 2O 5) NO 6) CN
Key :5
424. How many of the following compounds violate octet rule
1) 5BrF 2) 6SF 3) 7IF 4) 4CH
5) 5PCl 6) 2BeCl
Key :5
425. How many of the following ions have the same magnetic moment
2 2 2 2, , ,Fe Mn Cr Ni
Key :2
426. If each hydrogen atom in the ground state, 1.0 mol of H atoms are excited by absorbing
photons of energy 8.4eV,12.09eV,and 15.0eV of energy, then the number of spectral
lines emitted is equal to.
Key :3
427. The velocity of electron in certain Bohr’s orbit of hydrogen atom bears in the ratio
1:275 to the velocity of light. The quantum number (n) of orbit is nearly
Key :2
428. The wave length of a line in Balmer series of hydrogen atom is 4814 0A .From which
orbit de-exitation takes place nearly
Key :4
429. The deBroglie wave length of an electron in a certain orbit of hydrogen atom 13.3 0A
.So the no. of waves present in an orbit is
Key :4
430. If uncertainties in measurement of position and momentum of an electron are equal,
then the uncertainty in measurement of its velocity is 1210x .The value of x[the
closest whole number value] is 319.1 10 ,em kg and h=6.625 3410 Js.
Key :8
431. Number of ionization potential for uninegative oxide ion.
Key :9
432. Among the following has many are amphoteric metal oxides.
2 3 2 3 2 2, 2, 1 , , , ,CO A O As O SnO PbO GeO PbO
Key :3
433. Among the following in which process energy is released.
a) N g e N g b) Be g e Be g
c) O g e O g d) Mg g Mg g e
e) O g O g e f) Oh g e O g
g) H g H g e h) 2O g e O g
i) 2Mg g Mg e j) P g e P g
Key :4
434. First the elements in the first short period of modern periodic table, maximum
possible oxidation state with respect to oxygen is _______________ .
First and second ionisation energies of an element M are 600KJ/mole and 1600
KJ/more respectively. If 1000 KJ of energy is supplied to one mole of vapours of ‘M’.
Then in the resulting mixture mole percentage of 2M is 5x . Then the value of x is
Key :5
435. How many elements in the periodic table are lack of neutron (i.e., without neutron)?
Key :1
436. Among the following, what is the total number of compounds having +3 oxidation
sate of the underlined elements?
a) 4 2 7_
K P O b) 4___Na AuCl c) 4 10 28
___Rb Na H V O
d) __I Cl
e) 6___Ba XeO f) 2__
O F g) 2___ 2Ca Cl O h) 2___
N O
Key :3
437. CN ion is oxidised by a powerful oxidizing agent to 3NO and 2CO or 23CO
depending on the acidity of the reaction mixture.
2 3CN CO NO H ne
What is the number n of electrons involved in the process, divided by 10?
Key :3
438. In the following reaction
3 3 2 4 32xZn yHNO dil aZn NO bH O cNH NO . What is the sum of the
coefficients ?a b c
Key :3
439. What is the sum of protons, electrons and neutrons in the heaviest isotope of
hydrogen?
Key :4
440. How many moles of phosphines are produced when one of the calcium phosphines
reacts with water
Key :2
441. The average speed of ' 'He is _ times of 2SO at same temperature
Key :4
442. RMS speed of a gas is 15 .ms If some molecules out of 10 molecules in all, are
moving with 17ms and rest of all the molecules are moving with 13 .ms The number
of molecules moving with higher speed is ____
Key :4
443. rmsU of 4CH at ‘T’ K is 6 times of mpU of 2SO at 1 .T K The temperature of 4CH gas is
____ times of 2SO
Key :6
444. The organic compound containing phosphorous is heated with an 2 2.Na O The
phosphorous is oxidized to " "x major compound. Oxidation state of phosphorous is
the ' 'x is
Key :5
445. Out of the given below, how many of the following are used for purification of
organic compounds. Sublimation, crystallization, distillation, differential extraction
chromatography
Key :5
446. How many number of compounds are green house gases in the following
2 2 4 3 2, , , , , , ,CO NO NO CH O H O CFC 2 2 2 4,H O C F
Key :0007.00
447. 100ml of sample of water requires 3.92 mg of 2 2 7K Cr O in presence of 2 4H SO for the
oxidation of dissolved organic matter present in it. The COD of the water sample in
PPM is
Key :0006.40
448. Total number of hybrid orbitals present in the carbon atom of the gas involved in
Bhopal gas tragedy?
Key :0006.00
449. Amongst the following, the total number of compounds which will undergo addition
reaction will be:
A) 3 2CH CH CH B) 2CH
C)
3 2CH C CH
3CH D) 2Ph CH CH
E) 4CH F) 2 2CH CH
Key :0005.00
450. Total number of stereo isomeric products obtained by addition of bromine to 2-
pentene
Key :0004.00
451 Number of photons of lights with a wave length of 4000 pm necessary to provide one
joule of energy approximately 1610 .x Then x is
Key:2
452 Energy of a light particle is 196.625 10 J then wavelength of the particle is 310x A .
Then x is ____
Key:3
453 Number of photons of lights with a wave length of 4000 pm necessary to provide one
joule of energy approximately 1610x Thenx is_____
Key:2
454 Number of waves made by a Bohr electron in an orbit of maximum magnetic quantum
number ' 2 ' is ________
Key:3
455 The electronic velocity of 4th Bohr orbit is ' 'V The velocity of electron in the First
Bohr orbit would be _____ times of ' 'V
Key:4
456 How many waves are there in the sixth Bohr’s orbit of hydrogen.
Key:6
457 Radius ratio of 3rd orbit to 1st orbit of ‘H’ atom is
Key:9
458 The wavelength corresponding to a transition when electron falls from a certain
quantum level (n) to the ground state of an He ion is 24.31 nm. The velocity of the
electron in the next higher quantum level to that of velocity of light is
8.739 10 .x What is the value of .x
Key:7
459 Nitrogen laser produces a radiation at a wavelength of 337.1 nm. If the number of
photons emitted is 245.6 10 per second. The power of this laser is 13.3 10 .x J s What
is the values of ' 'x .
Key:6
460 Three isotopes of an element have mass number m, m 1& m 2 . If their ratio of
abundance is 4:1:1 and mean mass is 1mx
then x is
Key:2
461 The probability to find the electron of xyd orbital along z-axis
Key: 0
462 The maximum number of electrons that can have principal quantum number, 3,n and
spin quantum number, 1 ,2sm is
Key:3
463 If m has seven values, the value of azimuthal quantum number should be ____
Key:3
464 The spin only magnetic moment of an ion of manganese is 3.87BM in its +x oxidation
number. The value of x is _____
Key:4
465 Which elements are investigated by Lassigne’s test and Beilstein’stest
(Separately and in total) ?Cl , S , N , P ,O , Br
Key:5
466 During detection of sulphur is lassign’s test a violet compound with formula
5" "xNa Fe CN NOS is formed. What is x ?
Key:4
467 How many compounds respond to Lassaign test for nitrogen giving prussian blue
colour?
Key:5
468 An alkaloid constains 17.28% of nitrogen and its molecular mass is 162. The number
of nitrogen atoms present in one molecule of alkaloid is _____
Key:2
469 An element X belongs to group 15 and 2nd period in the periodic table the atomic
number of elements is____
Key:7
470 The number of groups which contains only gaseous elements is _________
Key:1
471 Some properties are given below. Among them how many properties are considered
as periodic properties.
a) Ionisation potential b) Atomic radius
c) Atomic number d) Electron gain enthalpy
e) Metallic nature f) Valency
g) Valence shell electronic configuration
h) Atomic mass i ) Electronegativity
Key:7
472 For an element (X) the successive ionization energies, 1 2 3 4 5, , ,IE IE IE IE and IE are 800,
2427, 3658, 25024 and 32824 1kJ mol respectively, then what is the number of
valence electrons present in the element ?
Key:3
473 Ionisation energy of 3M is 217.6 eV compared to that of 54.4He eV . Thus, atomic
number of 3M is _________
Key:4
474 Number of carbon atoms in vinyl cyanide is ………
Key:3
475
When IUPAC name of following compound is given, then double bond and
substituent gets respectively X and Y numbers so the sum of (x + y) will be
Key:4
476
In this molecule
X = no. of 01 - carbon atoms
Y = no. of 02 - carbon atoms
Z = no. of 03 - carbon atoms
M = no. of 04 - carbon atoms
What is the value of X Y Z M ?2
Key:2
477 How many of the following elements have positive electron gain enthalpy values
, , , , , , , , , Be Mg Mn Zn Cd Hg Ne Ar P Na
Key:8
478 IP and EA values of an elements are 13.4 eV and 3.4 eV/atom, then its
electronegativity is/are
Key:3
479 The number of elements among the following, which have lower
electronegativity than oxygen atom, based on Pauling scale, is ______
F, Cl, Br, I, H, S, P, K, Ca
Key:8
480 No. of acidic oxides among the following is
Key:7
481 Find the number of bridge head carbons in ?
Key:2
482 Total sum of sp sp and sp s covalent bonds in acetylene
Key:3
483 The electrovalency of sodium in NaCl is
Key:1
484 Consider the following Born – Haber cycle for formation of 3MX S
Then calculate value 1
30q , here q1 is electron affinity of x(g) is KJ/Mole.
Key:5
485 No.of possible position isomers for Dichloro benzene is
Key:3
486 Number of hydrogens which can participate in tautomerism for the formation of
the following compound are
Key:8
487 100ml of 0.1M 3 2H PO is titrated with 0.1M NaOH. The volume of NaOH consumed in
this titration is 100xml. What is x
Key:1
488 A given solution of hydrogen peroxide is of 2.424% (w/v). Express this in terms of
volume strength as an integer
Key:8
489 A mixture of NaOH and 2 3Na CO requires 25 0.1ml M HCl using phenolphthalein as the
indicator. However, the same amount of mixture required 30ml of 0.1M HCl , when
methyl orange was used as the indicator. The molar ratio of NaOH and 2 3Na CO in the
mixture is :x y then the x y is
Key:5
490 The number of resonance structures for N is
Key:9
491 How many resonance structures can be drawn for the following molecule (including
the given)?
Key:3
492 At equilibrium, 1pK then the value of 0G will be equal to _____
Key:0
493 For the reaction A B C D , the initial concentration of A & B are equal but the
equilibrium concentration of ‘C’ is twice of equilibrium concentration of A. The
equilibrium constant is
Key:4
494 1 mole of gas A at 2atm pressure and 270C is present in a vessel and it is heated to 0327 C . A B C is established and 50% of A is dissociated. Find Kp
Key:2
495 The number of electrophiles among the following are 2BeCl , 2NO , 3O , 2 2 ,R O ROH
, 3Fe , 2Fe , 3,RMgX N , 2H O
Key:5
496 How many of the following are nucleophiles , , ,
Key:2
497 2Zn OH is a sparingly soluble salts with 194 10spK , in order to increase its
solubility to 40 M the pH of acid required is?
Key:4
498 What is the pOH of 0.1 M KB (salt of weak acid and strong base) at 25°C? (Given:
of B– = 7) bpK
Key:4
499 Amongst the following, the total number of compounds whose aqueous solution turns
red litmus paper blue is _____ .
4 2 42NH C O 3 2
Zn NO
3FeCl 2 3K CO 4 3NH NO LiCN
Key:3
500 How many of the statement(s) are correct
i) The nucleophile makes a rear attack in 2NS reaction and expels the leaving group
from front side. ii) 3 2CH O CH CH adds to HBr according to Anti-markownikoff’s
rule.
iii) The basicity of holgens decreases in the order ¯ ¯ ¯ ¯F Cl Br I , but the
nucleophillicity is reverse of it.
iv) The rate of 2NS reaction is independent of the polarity of the solvent.
v) Walden inversion is observed in 1NS
vi) Meisenheimer complex is resonance stable.
Key:3
501 The percentage hydrolysis of M/160 KCN solution at 25 C will be (Given for HCN, 106.4 10aK ) is _______ %
Key:5
502 The concentration of X in a solution saturated with 3AX 111.9 10Ksp and BX3
salts is 33 10 M . The Ksp of 3BX is 1210y . What is the value of ‘y’?
Key:8
503 When 1 mole of an ideal monoatomic gas is compressed adiabatically the internal
energy change involved is 24 cals. The temperature rise is
Key:8
504 A gas occupies 2 litres at STP. It is provided 58.63 joule heat so that its volume
becomes 2.5 litre at 1 atm. Calculate change in its internal energy_____ joule.
Key:8
KCN 2 4K SO NaCl
505 If 10 calorie of heat energy is added to a system and the system does 5 calorie of
work on the surroundings. What is the energy change of the system?
Key:5
506 A gas expand from against a constant pressure of 3 atm. The work done during
expansion is used to heat 4 moles of water of temperature 290K. Change in
temperature of water. (Specific heat of water ).
Key:2
507 One mole of an ideal monoatomic gas is mixed with one mole of an ideal diatomic
gas. The molar specific heat of the mixture at constant volume is (in Calories)
Key:4
508 The maximum number of structural isomers for an alkane hexane is
Key:5
509 The no. of structural isomers for 7 16C H
Key:9
510 Consider the following compounds : 4 3 3 3 3 2 3 3 2 2 2 3, , , ,CH CH CH CH OH CH CH CH CH CH CH CH CH
3 3 3 3,H C CH CH H C CH CH CH
3CH3CH 3CH
How many compounds can be prepared by Wurtz reaction in high yield?
Key:2
511 Number of dimerised products obtained when 3CH Cl , 2 5C H Cl and 3 2 2CH CH CH Cl are
together treated with Na in dry ether
Key:5
512 Ten litres of a sample of hard water contained 45 10 moles of 2MgCl . Its degree of
Hardness is ____ ppm.
Key:5
513 In the given reaction the value of x is …………
2 2 7 2 4 2 2K Cr O H SO xH O
5 2 4 22 5CrO K SO H O
Key:4
514 How many types of water is produced when a mixture of 2H , 2D and 2T is treated with
2O gas(Normal isotope of oxygen that is O -16)?
Key:6
515 How many of the following reaction intermediate are electron deficient
a) carbocation b) Nitrene c) carbene d) free radical e) carbanion
Key:4
516 What is the minimum quantity in grams of methyl iodide required for preparing one
mole of ethane by wurtz reaction is 142x g . Then ‘x’ is (Atomic mass of I=127)
Key:2
517. The relative humidity of air is 80% at 027 C .If the aqueous tension at the same
temperature is 27 mm Hg. The partial pressure of water vapour in the air will be in
______ mm
Key:21.6
518. Total number of electrophiles present in the following are
2 2 2 3 4 3 2, , , , , , , NH , BeCl ZnCl NO SO CN F CCl SnCl
Key:5
519. The value of Vapourdensity
Molecular weightof a gas is
Key:0.5
520. A certain quantity of a gas occupies 100ml when collected over water at 015 C and
750mm pressure. If it occupies 91.9ml in dry state at STP, the vapour pressure of
water at 015 C is in ----- mm
Key:13.2
521. For a certain gas, 2 a 0.24612atm mol and 2 12.67 10b l mol . Calculate the
inversion temperature for the gas in_____ Kelvin
Key:224.44
522 For the reaction A B C D , the initial concentration of A & B are equal but the
equilibrium concentration of ‘C’ is twice of equilibrium concentration of A. The
equilibrium constant is
Key:4
523 For the reaction 2 2 312
SO O SO , if we write XP CK K RT , then the value of x
is_______
Key:2
524 For the reaction 2 4 22 gN O NO , the degree of dissociation of 2 4N O is 0.2 at 1 atm.
Then the pK of 2 2 42NO N O is
Key:6
525 Out of 3 2 2 2 3: , , , : , , NH H O Cl SnCl NO BF and 3AlCl the number nucleophiles are…….
Key:3
526 Total number of electrophiles present in the following are
2 2 2 3 4 3 2, , , , , , , NH , BeCl ZnCl NO SO CN F CCl SnCl
Key:5
527 The ionic product of water at o60 C is 149.61 10 . The pH of water at o60 Cis :
Key:6.51
528 How many among the following species can be classified as Lewis acids?
Key:8
529 Identify number of nucleophilic substitution reactions in the given reactions?
A) B) Cl
.
alc KOH
C) D)
E) F)
Key:2.0
530 How many substrates will show rearrangement during reaction?
, , , , ,
, , , ,
Key:6
531 2 4
3 2 2.conc H SOCH CH OH X H O
Total number of 2sp hybrid orbtials in X are ______
Key:6
532 xM OH (producing xM and OH ions) has 124 10spK and solubility 410 .M The
value of x is:
Key:2.0
533 2Zn OH is a sparingly soluble salts with 194 10spK , in order to increase its
solubility to 40 M the pH of acid required is?
Key:4
534 Among the following salts how many salts undergo only anionic hydrolysis?
(i) NaCl (ii) 4NH Cl (iii) 4NH CN (iv) NaCN (v) KCN
Key:2
535 Identify number of nucleophilic substitution reactions in the given reactions?
A) B) C)
D) E) F)
Key:2.0
536 How many groups are /o p director in the electrophilic aromatic substitution?
3
32
O O
C M
i NH ii COH iii N O iv COOH
v OMe vi O vii Et viiie C NHN
Meix N x O HH S
Key:6
537 2( )Zn OH is a sparingly soluble salts with 194 10 spK , in order to increase its
solubility to 40 M the pH of acid required is?
Key:4
538 Among the following, the total number of physical properties which are extensive are:
(a) density (b) viscosity (c) Surface tension volume (d) dipolemoment (e) Volume
(f) specific heat (g) enthalpy (h) internal energy (i) entropy (j) Gibbs energy
Key:5
539 10 grams of argon gas is compressed isothermally and reversibly at a temperature of
from 10 L to 5 L. Calculate the work done for this process in multiple of
calories.
Key:1.03
540 When sodium propanoate heated with sodalime gives an alkane. No of carbon atoms
in the alkane
Cl
.
alc KOH
Key:2
541 Number of alkanes obtained on electrolysis of a mixture of 3CH COONa and
2 5C H COONa are
Key:3
542 If enthalpy of neutralization of HCl by NaOH is - 157kJmol and with 4NH OH is
150kJmol . Calculate enthalpy of ionization of 4NH OH aq
Key:7.0
543 An intimate mixture of ferric oxide,Fe2O3,and aluminium, Al, is used in solid fuel
rockets. Calculate the fuel value per cc ( kcal/cc) of the mixture. Heats of formation
and densities are as follows: 2 3H Al Of -399 kcal/mol, 2 3H Fe Of -199 kcal/mol
Density of 2 3Fe O 5.2 g / cc , Density of Al=2.7 g/cc Atomic Wt. of 56Fe , 27Al ,
16O
Key:4.0
544 Heat of combustion of A(s) is 110kcal mol and that of B s is 115 .kcal mol
Mixture containing 3 moles A(s) and x moles B(s) on combustion released 105 kcal of
heat. What is the value of ?x
Key:5.0
545 An alkane with molecular formula 5 12C H has primary, secondary as well as tertiary
hydrogen. It is heated with 2Br to give N substitution products, which are subjected to
fractional distillation. The total number of fractions obtained is F. Calculate the value
of .NF
Key:1.5
546 What is the minimum quantity in grams of methyl iodide required for preparing one
mole of ethane by wurtz reaction (Atomic mass of I=127)
Key:284.00
547 The mass of CaO will be required to remove the hardness of 1000 lit. of water
containing 65.17gm of 3 2Mg HCO is 50 y then ‘y’ is
Key:1
548 50 ml of water sample, containing temporary hardness only, required 0.1 ml of
50M HCl for complete neutralisation. Calculate the temporary hardness of water in ppm.
Key:2
549 How may number of monochlorinated products are obtained by 3-ethyl pentane :
Key:4.0
550 Number of hyper conjugate structure possible for
Key:9.0
551 For how many of the following compounds, all the resonating structure are equivalent
..
22 CH CHH CHC
HN
Key:4.0
552. Energy of a light particle is 196.625 10 J then wavelength of the particle is 310x A .
Then x is ____
Key: 3
553. A radio station is broadcasting programmes at 100 M Hz frequency. What is the wave
length ( in meters) of the radiation ?
Key:3
554. Among the compounds, Benzene, Carbon tetrachloride, Naphthalene, Benzoic acid,
Isooctane and Anthracene, how many can be purified by sublimation.
Key:3
555. The odd element in how many of the following can be estimated
usingcarius method ?
2 2 6 5 2 2 6 5, , , ,RCONH RCOCl NH OH C H COCH SO C H
6 5 3,C H SCH
Key:6
556. 0.4 g of an organic compound on kjeldahl’s analysis gave enough Ammonia to just
neutralize 20 ml of 0.1 2 4NH SO . What is the percentage of nitrogen in the compound.
Key:7
557. Find the number of compounds that can’t be estimated by Kjeldahls method
Key:6
558. 0.002 gm of an organic compound was treated according to Kjeldhal’s
method. 40.2 10 mol of 2 4H SO was required to neutralise. 3NH . The percentage of
2N is 7x %, then x is
Key:4
559. Among the halogens, F,Cl,Br ,I how many can be identified by Belistrien’s test
Key:3
560. In kjeldahl’s estimation of nitrogen, the Ammonia evolved from 0.5gms of
an organic compound neutralised 10ml of 1M 2 4H SO . The % of nitrogen in the
compound is (50+X)% what is ‘X ‘ ?
Key:6
561 The frequency of a radiation having a wave number 14 12 10 cm will be 24 1x 10 S . Then
the value of x is ____________
Key:6
562. Wavelength associated with an electron having KE 253.0 10 J is 710 .x m What is the
value of x adjusted to nearest integer?
Key:9
563. The probability to find the electron of xyd orbital along z-axis
Key:0
564. No. of nodal planes in 3d-orbital is/are _________
Key:2
565. The momentum of a micro particle is 6.627 24 110 . .secm Kg . It’s De-Broglie wave
length is 0xA . What is x ?
Key:1
566. According de Broglie the circumference of the third orbit is equal to ‘x’ . then what
is ‘x’?
Key:3
567.
When IUPAC name of following compound is given, then double bond and
substituent gets respectively X and Y numbers so the sum of (x + y) will be
Key:4
568. Find out the correct LOCATION for formyl group in the following organic
compound, when it’s correct IUPAC name is written.
Key:6
569. In the following, number of methyl group(s) as side chain is (are) ……..
Key:1
570. The volume of 0.150 molar HCl is required to neutralise 25ml of 0.120 molar
2Ba OH is 10 x ml then the value of x is
Key:4
571. Mole fraction of solute in an aqueous solution is 0.1 and the molality of that aqueous
solution is 0.17x then the value of x is
Key:6
572. 1M HC l and 2M HCl are mixed in volume ratio of 4 :1. The final molality of the
solution is 1.2 10x . The value of ‘x’ is
Key:0
573. The total number of contributing structures showing hyperconjugation (involving
C H bonds) for the following carbocation is :
Key:6
574. How many hyper conjugative structures are possible for 2 – butene?
Key:7
575. 32 3 2 2 108PA B solid A B g B g K atm what is equilibrium pressure (atm) if 2 3A B
is allowed to dissociate in a closed empty flask?
Key:9
576. The equilibrium constant for the reaction 2 2 2g g gH I HI is 2 at a certain
temperature. The respectively at equilibrium concentrations of 2H and HI are 12 .mol lit
. What is the equilibrium concentration (in moles/ltr)
Key:1
577. 2 2 32 2SO O SO , starting with 2 mole 2SO and 1 mole 2O in 1 litre flask, mixture
require 0.4 mole 4MnO in acidic medium, Hence cK is
Key:2
578. What is the minimum number of carbons present in alkane molecule which is
optically active
Key:7
579. The no. of structural isomers for 7 16C H
Key:9
580. The Kavalues of 3 4H PO are 310 , 810 and 1310 . The pH of a phosphate buffer
containing 0.1M 2 4NaH PO and 1M 2 4Na HPO is
Key:9
581. Amongst the following, the total number of compounds whose aqueous solution turns
red litmus paper blue is _____ .
KCN 2 4K SO 4 2 42NH C O NaCl 3 2
Zn NO
3FeCl 2 3K CO 4 3NH NO LiCN
Key:3
582. In 1 litre saturated solution of , 0.1 mol of
is added. The resultant concentration of in the
solution is . The value of “x” is.
Key:7
583. Mono bromo derivatives
The number of possible mono bromo products are (excluding stereo isomers)
Key:5
584. The number of Primary Hydrogen atoms in 2 – methyl butane
Key:9
585. The solubility product of 2SrF in water is 108 10 Calculate its solubility in 0.1 M of
NaF aqueous solution. If its solubility is expressed as 810y then when is the value of
‘y’ ?
Key:8
586. The combustion of 10 g coke raised the temperature of 1.0 kg water from to
. Calculate the calorific value of coke. (Specific Heat of ).
Key:4
587. Extensive properties among the following are Enthalpy, free energy, entropy, volume,
density, refractive index, viscosity, molarity, molality, pressure.
Key:4
588. A gas expand from against a constant pressure of 3 atm. The work done during
expansion is used to heat 4 moles of water of temperature 290K. Change in
temperature of water. (Specific heat of water ).
Key:2
589. One mole of an ideal monoatomic gas is mixed with one mole of an ideal diatomic
gas. The molar specific heat of the mixture at constant volume is (in Calories)
Key:4
590. Gas ‘ xA ’ has the ratio of specific heat capacities equal to 1.66, then the value of ‘x’
is_____
Key:1
591. The minimum number of carbon atoms to be present in an alkene to exhibit optically
activity is
Key:6
592. Find the total number of sigma bonds in ethylene?
Key:5
593. No. of 2sp hybrid carbon atoms present in allene is
Key:2
594. On catalytic reduction with 2 /H Pt how many alkenes will give n – butane ?
Key:2
595. The degree of hardness of a sample of water containing 12 mg of 4MgSO per kg of
water is x . Then 5x is
Key:5
596. The sum of protons, electrons and neutrons in the heaviest isotope of hydrogen is___
Key:4
597. 50 ml of water sample, containing temporary hardness only, required 0.1 ml of
50M HCl for complete neutralisation. Calculate the temporary hardness of water in ppm.
Key:2
598. No. of 2sp hybrid carbon atoms present in allene is
Key:2
599. How many products will be formed in this reaction?
Key:2
600. RMS velocity of a gas at a given temperature is how many times to the its most
probable velocity
Key:1.224
601. How many times the RMS Velocity of hydrogen at 027 C is that of Nitrogen at
0327 C .
Key:2.645
602. The RMS velocity of a gas at 00 C is 2.62 / secm . The RMS velocity of the same gas at 0819 C is _____ / secm
Key:5.24
603. A vessel of 25 liter capacity contains 10 moles of steam under pressure of 50.3 atm .
Calculate the temperature of steam using Vander waal’s equation in_____K (if for
water 2 25.46 a bar L mol and 10.031b L mol )
Key:1539.5
604. Under critical states for one mole of a gas , compressibility factor is :
Key:0.375
605. The no. of structural isomers for 7 16C H
Key:9
606. How many optically active lightest isomeric alkanes are theoretically possible with
2 2n nC H formula?
Key:4
607. In the equilibrium 2
2 2s aq aqCaF Ca F , if the concentration of F at new equilibrium
is double the concentration of F at old equilibrium, then concentration of 2Ca at the
new equilibrium will be how many times less than the concentration of 2Ca at the old
equilibrium.
Key:4
608. For the reaction A B C D , the initial concentration of A & B are equal but the
equilibrium concentration of ‘C’ is twice of equilibrium concentration of A. The
equilibrium constant is
Key:4
609. Ammonium carbonate is heated at 227 C in a closed vessel of volume 8210 ml
containing 0.2mole of Argon gas. The manometer attached to the vessel shows a
pressure of 1 atm. Find pK for the decomposition of ammonium carbamate.
2 4 3 2NH COONH (s) 2NH (g) CO (g) Key:0.0
610. The ionic product of water at 060 C is 149.61 10 . The pH of water at 060 C is
Key:6.51
611. The number of structural isomers for 6 14C H
Key:5
612. Find out number of dimerize products obtained by the following reaction
3 3 2 3 2 2Na
dry etherCH Cl CH CH Cl CH CH CH Cl
Key:5
613. If 3-bromo-4-methylhexane is treated with ethanolic KOH solution, how many
different alkenes would be formed?
Key:6
614. How many among the following species can be classified as Lewis acids?
Key:8
615. Calculate the pH of solution made by mixing 50ml of 0.2M 4NH Cl & 75 ml of 0.1 M
53 1.8 10bNaOH K of NH
Key:9.73
616. Calculate the amount of 4 42NH SO in grams which must be added to 500 ml of
30.2M NH to give a solution of 9.3pH . Given bpK for 3 4.7NH Key:6.6
617. The Ka of an indicator HInis 49 10 . The percentage of basic form of indicator is 10x
in a solution of pH is 4. What is x?
Key:9
618. 2, 2, 4-trimethyl pentane 2 /Cl hv n monochlorinated products. The value of n is
Key:4.0
619. How many products are possible for monochlorination of propane
Key:2.0
620. The spK of A3B salt in water is 3
123 1016
and it ionises as 1 33 3A B A B
, its solubility in water is 1 10 yx
then ?x y
22 33 32 3CCl , BCl , BI , FeCH , Cl , CO , , AlCl
Key:5
621. In 1 litre saturated solution of 101.6 10spAgCl K AgCl , 0.1 mol of
61.0 10spCuCl K CuCl is added. The resultant concentration of Ag in the
solution is . The value of “x” is.
Key:7
622. Among the following, find the total number of intensive properties?
Temperature, pressure, density, Surface Tension, melting point, Boiling point, Mass
Key:6
623. No of meso products formed in the following reaction is…
Key:0
624. The number of alkenes having higher heat of combustion than but-1-ene is Ethene,
propene, cis – but-2-ene, trans – but-2-ene, pent-1-ene, 2-methyprop-1-ene
Key:1
625. Enthalpy of combustion of 4CH gas is 890.3 KJ/mol. When 445.15KJ of heat is
evolved , the number of grams of 2CO released in the combustion is 44x
grams, the
value x is ____
Key:2
626. Heat of neutralisation of a polybasic acid by strong base is 154.8 .kcal mol What is
basicity of the acid?
Key:4.00
627. The enthalpy of polymerization of ethene per mol is calculated to be 19x kJ mol from
the data given below ,C C C CH H at 298 K are + 590 and 1331 kJ mol what is the
value of x?
Key:8
628. The number of alkenes (open chain as well as cyclic) of six carbon giving same
product with HBr in presence of peroxide and absence of peroxide.
Key:7.0
629. How many of the following addition reaction are syn addition reaction
A) B)
C)2 4,
3 3
H Pd BaSO
H C C C CH
D)3, .
3 3
Na Liq NH
H C C C CH
E)
Key:3
630. The maximum possible number of hydrogen bonds a water molecule can form in ice
is……….
Key:4
631. What is the sum of protons, electrons and neutrons in the heaviest isotope of
hydrogen?
Key:4.00
632. The mass of CaO will be required to remove the hardness of 1000 lit. of water
containing 65.17gm of 3 2Mg HCO is 50 y then ‘y’ is
Key:1
633. Among the following, the number of compounds, which can participate as ‘diene’
component in a Diels-Alder reaction is __.
Key:6
634. No of moles of methanal formed on ozonolysis of 1, 3 – butadiene
Key:2
635. 5.0 ml of 2 2H O solution liberates 1.02 gm of 2I from an acidified KI solution.
Calculate the strength of 2 2H O solution in terms of volume strength at STP.
Key:9.00
636. LiCl is deliquescent and crystallizes as a hydrate 2.LiCl xH O . Find the value of ‘x’.
Key:2.00
637. The volume of perhydrol required to get 1 Lit. of Oxygen gas at STP is 2x ml. Then x
is
Key:5.00
638. Total number of stereo isomeric products obtained by addition of bromine to 2-
pentene
Key:4.00
639. The number of alkenes having higher heat of combustion than but-1-ene is Ethene,
propene, cis – but-2-ene, trans – but-2-ene, pent-1-ene, 2-methyprop-1-ene
Key: 1.00