CLASS X COMBINED WINTER BREAK HHW.pdf - KENDRIYA ...

12/18/2020 Super 20 All In One Class 10 Mathematics Standard & Basic-Full Marks Pvt Ltd Flip PDF | PubHTML5

https://pubhtml5.com/elyn/ucvy 1/36

KENDRIYA VIDYALAYA D.R.D.O BENGALURU-560093

MATH PORTFOLIO (Art integrated activity)

SESSION-2020-2021

NAME OF STUDENT-

CLASS-

SECTION-

ROLL NUMBER-

In K.V.D.R.D.O studying in class___________________.

Note: For the achievements you mention above ,attach the certificates of maths related competitions/tests .

MATHEMATICS (ART INTEGRATED ACTIVITY)

CLASSIX/X ( 2020-2021)

TOPIC : UTTARAKHAND AND KARNATAKA

1. Introduction to ancient geometry.

2. Use of geometry in various art forms/monuments and

structures in INDIA.

3. Monuments and Structures in Uttarakhand and Karnataka-

Shapes and size of structures.(Similarities and differences)

4. Geometry in various art forms of monuments and structures

of Uttarakhand and Karnataka.

5. My learning experiences in doing this project.

NOTE : Make a single pdf and upload in the google class

room.

Submission date - 05/01/2021

KendriyaVidyalaya DRDO HOLIDAY HOME WORK

(i) Sample Paper 2020—

ENGLISH – Language and Literature (Code 184) CLASS-X

Time allowed: 3 Hrs. Maximum Marks: 80 General Instructions: 1. This paper is divided into two sections: A, and B. All questions are compulsory. 2. Separate instructions are given with each section and question, wherever necessary. Read these instructions very carefully and follow them. 3. Do not exceed the prescribed word limit while answering the questions. Part A (40 Marks) READING (20 marks)

1. Read the passage given below.

Red Cross: How Hope Evolved On June 24, 1859, Emperors Napoleon III and Franz Joseph I engaged in the Battle of Solferino, commanding a combined total of about 270,000 troops onto the field for a single day of battle. Nearly 40,000 were either dead, injured, or missing, many of whom were simply left to die on the battlefield. Later, spectators crowded the fields, looking for loved ones, searching for items they could sell, or simply taking in the horrors of the battle .A Swiss businessman and social activist Jean Henri Dunant, who was traveling in Solferino witnessed all this. Jean Henri Dunant witnessed the atrocities of war as well as the countries not prepared or equipped to ease the suffering of those who had been injured in the Battle of Solferino. Dunant organized a group of volunteers to help bring water and food to the injured, to assist with medical treatment, or write letters to the families of those who were dying and he urged the public to create an organization which would assist the wounded, regardless of which side they fought for during times of war. After that moment, he wrote the book, A Memory of Solferino, which urged the public to create an organization which would assist the wounded, regardless of which side they fought for during times of war. His writing inspired countless others to rally behind him in the creation of the International Federation of the Red Cross. The modern-day Red Cross began by devoting itself largely to disaster relief and epidemic treatment. This effort continues to this day. One of the easiest ways you can help the Red Cross is to make sure you are able to donate blood and make an appointment at the Red Cross website. But, donating blood isn't the only way you can help out—the Red Cross also encourages donating your time if you can. This is what the Red Cross wants everyone to know.

On the basis of your understanding of the passage, answer ANY TEN questions from the twelve

that follow. (1x10=10) i. How many soldiers fought in the battle of Solferino on June 24? a) 270,000 b) 40,000 c) 230,000 d) 23,000 ii. What is the correct order of the information given below: I. Dunant organised a camp of volunteers. II. Emperor Napoleon III and Franz Joseph I fought a battle. III. The book ‘A Memory of Solferino was written.

IV. Dunant travelled in Solferino. a) Option (1) IV, III, II, I b) Option (2) I, II, III, IV c) Option (3) II, I, IV, III d) Option (4) II, IV, I, III iii. The writer of 'A Memory of Solferino’ was: a )Emperor Napoleon III b) Franz Joseph I c) Jean Henri Dunant d) International Red Cross iv. The modern day Red Cross does not deal with: a) Blood donation b) Disaster Relief c) Epidemic Treatment d). Writing a book v. The most appropriate sub-heading to para 2 of the passage is: a) How International Federation of Red Cross Evolved! b) Functions of Red Cross c) The Contributions of Jean Henri Dunant d) The Battle of Solferino vi. The aid provided by Dunant’s volunteers during the battle of Solferino was: I .to help bring water and food to the injured II .to assist with medical treatment III. to write a book IV. to give relief in epidemic a) Option (1) I and III b) Option (2) III and IV c) Option (3) I and II d) Option (4) II and III vii. You can donate your blood and your _________ to Red Cross.

a) time b) money c) clothes d) houses

viii. Jean Henri Dunant participated in the war. a) true b) false c) none of the above

ix. Jean Henri Dunat was a----

a) A Swiss businessman and social activist b) An American news reporter c) A Swiss businessman and newspaper reporter d) A Artist and social reformer

x. Emperors Napoleon III and Franz Joseph I engaged in the Battle of Solferino, in the year—

a) June 24, 1859 b) July 24, 1969 c) June 24,1979 d) July 24, 1989

xi.Jean Henri Dunat wrote a book,the name of the book was-

a) A Memory Of Solferino b) A Memory of Dunat c) A Memory of War d) A Memory and War xii. The synonym of `lessen ` as given in the paragraph 2 is: a) ease b) equipped c) urged d) donate

2. Read the passage carefully- The Road to Success 1. The Road to success is not straight; there is a curve called failure, a loop called confusion, speed bumps called friends, caution lights called family, and you will have flats called jobs. But, if you have a spare called determination, an engine called perseverance, insurance called faith, and a driver called God, you will make it to a place called success! 2. In spite of all our planning and preparation, unexpected challenges are certain to arise. The bumps in the road are unavoidable, but you’ll never get to your destination if you aren’t willing to drive over them. The difference between a disaster and triumph lies in whether or not you’re prepared and willing to weather the storm. If you’re ready, those bumps will become stepping-stones. 3. The key thing to realize is that working harder is same as working smarter. How do you work smarter? You just need to have the right skills. People want improved circumstances and better life without an improved self. They want victory without paying the price or making efforts. It really cannot happen without the other. Any improvements that have not been generated by improving yourself are superficial and short-lived. If you want to have a better future, you have to change yourself. Stop worrying about the various challenges that will come your way. Just believe in yourself and use them as stepping-stones.

4. “Success” is getting whatever you want out of life without violating the rights of others.” It is not an accident. Success is the result of our attitude and our attitude is a choice. Hence success is a matter of choice and not chance.

5. Today success represents a holistic and positive attitude to life. Attitude is everything. Success is not restricted within some kind of brick and mortar premises. It assumes the individuality of a complete act executed with perfection; material achievements do not define life. We don’t remember sports stars for the products they endorse but the spirit of achievement they represent. In the abundance of positive attitude underline the grandeur of a truly rewarding rich life. 6. Success can be measured from two standpoints—the external and the internal. Externally it is the measure of a job well done and recognition. Internally it the feeling of achievement and wholeness derived from the completion of a task or fulfillment of desire.

On the basis of your understanding of the passage attempt ANY TEN questions from the twelve that follow. (1x10=10) i) The qualities lead to success are – a) Determination b) Perseverance c) Faith d) All the above ii) Success represents a ------------------------------------------ attitude to life

a) competition and hardwork b) holistic and positive c) desire and grit d) grandeur and rich life

iii) If you want to have a better future, you have to change yourself.

a) stop worrying about the challenges b) use them as stepping stones c) believe in yourself d) all the above

iv) “Success” is getting whatever you want out of life without violating the rights of others.” It is not an accident. Success is the result of our attitude and our attitude is a choice. So success is a matter of-------

a) choice and desire b) choice and chance c) choice and urge d) choice and need

v) Any improvements that have not been generated by improving yourself is----- a) short lived and superficial b) last long and eternal c) give pleasure for short time d) none of the above vi) Success can be measured from two stand points--------

a) the external and internal b) the inner and out c) the exterior and interior d) All the above

vii) The synonym of `victory ` as given in the paragraph 2 is—

a) planning b) preparation c) triumph d) challenges

viii) The synonym of `Surplus` as given in paragraph 5 is-----

a) enough

b) abundance c) more d) great

ix) The antonym of `defeat` as given in paragraph 6 is------- a) Recognition b) Achievement c) Completion d) Success x) The antonym of `deep` in the paragraph 3 is --- a) superficial b) short lived c) shallow d) thorough xi) The key thing to realize is that working harder is same as working smarter. How do you work smarter? . a) Have the right skills b) have to change yourself c) have to make efforts d) all the above

xii) The antonym of ` obey` in paragraph 4 is -------

a) disregard b) break c) comply d) violate

3. LITERATURE (10 marks) Read the extracts given below and attempt ANY ONE, by answering the questions that follow (5x1) A The baker or bread-seller of those days had a peculiar dress known as the kabai. It was a single piece long frock reaching down to the knees. In our childhood we saw bakers wearing shirt and trousers which were shorter than full-length ones and longer than half pants. Even today, anyone who wears a half pant which reaches just below the knees invites the comment that he is dressed like a pader! i.Choose the answer that lists the correct option about the recording of the baker’s monthly accounts a) Written on the dress b) Remembered by the baker c) Written on the wall d) Calculated on the palm ii. When the writer says, ‘Baking was indeed a profitable profession in the old days.’ he means that a) Baking isn’t as popular in Goa currently. b) Bakers have chosen to adopt other professions. c) Baking, as a job, isn’t as gainful as it used to be. d) Bakers’ goods were of a better quality in earlier times. iii. The statement that is TRUE about payment collection, according to the passage is: a) The baker received payment on a daily basis. b) The baker was paid for his services at the end of the month.

c) The baker insisted that customers pay before the month-end. d) The baker chose to receive payment any day of the month. iv. The kabaiwas a ‘peculiar’ outfit as it was a) A tight-fitting apparel. b) Too colourful. c) Made of unsuitable materials. d) A dress-like attire. v. The extract uses the phrase, ‘invites (the) comments’. Which of the following expressions is incorrect with respect to the word ‘invites’?

a) trouble b) prayer c) guest d) application

OR B He who speaks peace should draw out the arrow of lamentation, and complaint and grief. He who has drawn out the arrow and has become composed will obtain peace of mind, he who has overcome all sorrow will become free from sorrow and be blessed. i) Lamentation is composed with:

a) an arrow that pierces the heart of others. b) adaggar that gives deep wound. c) a sword that kills your peace of mind d) a spear the pierces your heart

ii) One can get peace of mind by a) taking out the arrows of lamentation, complaint and grief b) not grieving and complaining c) having faith in god d) to feel sorry.

iii) One can be free from sorrow; a) if he overcomes grief

b) if he stops lamenting it c) if he takes it as a will of god d) if he engages himself in the service of others

iv) The word lamentation means: a) to wail b) to express sorrow demonstratively c) to regret stongly d) to feel sorry

iv) Who is the speaker? a) KisaGotami b) Gautama Buddha c) A pilgrim d) Writer

4. Read the extracts given below and attempt ANY ONE, by answering the questions that follow. (5x1) A I saw it go Merrily bouncing, down the street, and then Merrily over — there it is in the water! No use to say ‘O there are other balls’:

An ultimate shaking grief fixes the boy As he stands rigid, trembling, staring down All his young days into the harbour where His ball went i. The poet uses the ball as a symbol of the boy’s a) Sense of adventure. b) Carefree childhood days. c) Ability to bounce back. d) Extended family. ii. The poet feels that there is no point consoling the boy as a) It would give him false hope. b) He might demand for a new ball. c) It might distress him further. d) Whatever he has lost is irretrievable. iii. The word ‘harbour’ DOES NOT have a meaning similar to a) Port. b) Pier. c) Dock. d) Cargo. iv. ‘Merrily over — there it is in the water!’ The dash here is meant to convey a) Some familiar experience. b) a feeling of excitement. c) A sense of unexpected interruption. d) Some thoughtful moments. v. The word that DOES NOT indicate a physical manifestation of sorrow in the boy, is a) Worthless. b) Shaking. B OR Belinda embraced him, Mustard licked him, No one mourned for his pirate victim Ink and Blink in glee did gyrate Around the dragon that ate the pirate (i) Whom did Belinda embrace? (a) Custard the dragon (b) Little yellow dog (c) Little black kitten (d) Ink (ii) What did the Mustard do?

(a) He ate the banana (b) He ate the pirate (c) He licked the dragon (d) he mourned for his pirate victim

(iii) The word `mourned ` means (a) Lamented (b) Happy (c) Jumped (d) Rejected

(iv) In glee did gyrate mean ------ (a) They danced happily (b) They ran round each other (c) They circled each other (d) They played games

(v) Everyone embraced Custard because---- (a) He tickled Belinda

(b) He scared Mustard (c) He fought Blink (d) He killed the pirate GRAMMAR (10 marks) Q.5 Complete the paragraph given below by filling in the blanks choosing the correct option from those that follow- ( 1x3) Elephants (a) _____ the largest land mammals. Three species of elephants (b) _____ living today. Elephants (c) ________other Elephantidae were once classified with other thick skinned (a) (i) is

(ii) are (iii) was (iv) were

(b) (i) are living (ii) have been living (iii) had been living (iv) will be living (c) (i) with (ii) also (iii) and (iv) but 6. Choose the correct options to fill in the blanks to complete the following narration. (3x1) Suresh: Can I go for shopping now? Shyam: No, you can’t. Suresh: Why do you stop me? Shyam: Because you have not completed your home work. Suresh: Oh! Completing the HW will take another 4 hrs. Complete the following based on the conversation given above. Suresh asked whether (i) ____________________ Shyam said (ii) ____________________ Then Suresh wanted to know (iii) ___________________

(i) a) he could go for shopping b) he would go for shopping

c) he may go for shopping (ii) a)he would not b) he could not c) he won`t (iii) a)he had stopped him b)he didn`t stop him c) he stopped him

7. Fill in the blanks by choosing the correct options for ANY FOUR of the six sentences given below. (4x1) (i) You …………………… consult the Thesaurus if you need groups of synonyms for those words. a) had to b) need to

c) used to d) might (ii) Everybody …………… keen to participate in the upcoming nukkadnatak. a) are b) has c) is d) were (iii) The good news is that…………… volunteers dropped out this month than the last two. a) fewer b) less c) few d) a little (iv) It was …………… historic day for the organisation when ……………. honour was bestowed upon its employees. a) a; an b) an; the c) the; a d) an; a (v) At this time tomorrow we ………………………. our project details to ma’am. a) are presenting b) shall be presenting c) have been presenting d) will have presenting (vi) The Komodo dragon …………… follow its prey till it will eventually dies due to its venomous bite. a) must b) will c) could d) may Section B WRITING (2x5= 10 marks) 8. Attempt ANY ONE of the following in 100-120 words. (5 marks) (A) You are Neha/Nihal Singh, Computer In-charge of Army Public School. Your school wishes to buy 20 computers and computer accessories from Apple Inc., Nehru Place, New Delhi. Draft a letter placing an order for the same. OR (B) You are Anurag/Anandi, a resident of Devan Nagar Colony, Bhubaneshwar, and Orissa. You have noticed that some residents of your colony are repeatedly violating quarantine rules laid out during the outbreak of the COVID–19 pandemic.Write a letter to The Editor of the `The Times Of India`, drawing attention towards the same. Explain how such acts impact the health of the community and request the immediate authorities to see to it. 9. Attempt ANY ONE of the following in 100-120 words. (5 marks) (A) Question: The pie chart shows the proportion of people from different households living in poverty in the UK in 2002. Write an analytical paragraph to describe the information in 100-120 words.

The Pie chart below displays data. Write a paragraph analyzing the given data.

OR (B) Question 9: The noise pollution in Delhi has been growing at an alarming rate. Some loudspeakers, construction site sounds and honking of horn have disturbed basic living patterns. Write a paragraph in 100- 120 words on the “Effects of Noise Pollution” and how to control it.

LITERATURE 10. Answer ANY TWO questions in 20-30 words each, from (A) and (B) respectively. (2x4=8)

(A) (any two) (2x2=4)

i. What are the reasons which prompt Lomov to make a proposal to Natalya ? ii. Why did Belinda tickle the dragon? iii. How is bread an important part of life in Goa. (B) (Any two) (2x2=4) i. Bholi was a neglected child. Give reason for your answer. ii. Why was Matilda always unhappy? iii. Who was the Hack Driver What really hurt the lawyer`s feeling? 11. Answer ANY TWO questions in 40-50 words each, from (A) and (B) respectively. (3x4=12) (A) (Any two) (3x2=6) i.What is the theme or the central idea of Robert Frost`s poem `Dust Of Snow`? How has it been illustrated? ii. How did Mandela`s understanding of freedom change with age and experience? iii. What is the Indian legend regarding the discovery of tea leaves. (B) (Any two) (3x2=6) i. What are the qualities that go into the making of the scientist? ii. How did Griffin become a homeless wanderer without clothes and money?

iii. What didn`t Madam Forestier recognize Matilda? How did both the ladies look? 12. Answer ANY ONE the following in 100-120 words. (5x1) (A)” Faith can move mountains.” Elaborate with reference to ‘A Letter to God’. OR (B ) Life is full of trials and tribulations which can be overcome by a human being through his own efforts. Explain with reference to KisaGotami’s life. 13. Answer ANY ONE of the following in 100-120 words. (5x1) ‘How would it have been if she had not lost the Necklace? Who knows? How singular is life, and how full of changes! How small a thing will ruin or save one!’ (A) Ostentation and vanity often land people in trouble. Matilda is an apt example of this. Justify. OR (B) Draw a character-sketch of Bholi in your own words, highlighting her transformation from a ``harmless dumb cow”to a fearless and independent girl. `. Explain how ability and courage are essential to fulfill one’s dream.

(ii) ART INTEGRARED PROJECT PROJECT SHOULD HAVE AUDIO,VIDEO,VISUAL AND LITERARY INPUTS 1. Select any one of these states ----KARNATAKA /UTTARAKHAND 2.SELECT ANY ONE ASPECT OF YOUR SELECTED STATE (i) Culrural Heritage (song ,dance ,literary laurateslaurals in these fields) (ii) Sculpture and Monuments (iii ) Flora and Fauna (iv) Food and Costume (v)Number of district and their density (vi) Tourist places (vii) acheivements in the field of sports, education, art,cinema, The project should be done after doing proper research about the chosen topic. Collect the information and present in literary, pictorial,audio and video form. The project will be assessed on --- Content –5 marks Presentation – visual input--5 marks Technical input—5marks Literary input ---5 marks Total 20 marks Project to be submitted in the digital (soft) form.

शीतकालीन अवकाश गहकारय 2020-21 ककषा दसवी ी ववषर- वहीदी १. निबध लखि। (क) मरी अनिसमरणीय यातरा। (ख) एक भारत शरषठ भारत। (ग) िारी सशकतीकरण। २. सदश लखि। (क) अपि नमतर को होली की बधाई दत हए सदश नलखखए। (ख) बट क जनमनदि पर माताजी क ओर स शभ कामिा का सदश नलखखए। पद पररचय नलखखए। हम बाग म गए परत िहा कोई आम ि नमला। शीत ऋत म नहमालय का कषतर पणणतया बरण स ढक जाता ह। और िहा जिजीिि असतवयसत हो जाता ह। िह छातर बहत चतर ह। ३. रस और उिक परकार दो-दो उदाहरण सनहत नलखखए। सीबीएसई दवारा परकानशत परनतदशण परशनपतर नलखखए।

CLASS-X (A & B) SANSKRIT-HOLIDAY HOME-WORK 1. उ राख ड य णीय- तलाना िच ािण स ,

िच ाधा रत-वा यािन ( स कतन) लखनीयािन । ( for CBSE-Project , in separate file ) ( यनाित यन प िच ाणा कत ।)

2. आदश प ाणाम उ रािण लखनीयािन ( CBSE BOARD EXAM ) ( for any 2 or 3 papers )

*****

Sub: - Science ART-INTEGRATED PROJECT TOPICS FOR CLASS X A

STATE : KARNATAKA TOPICS

1 Biodiversity in Karnataka

2 Flora of the state of Karnataka

3 Wildlife of the state of Karnataka

4 National parks in Karnataka

5 Tribal life in Karnataka name of the tribes and livelihood

(Choose any one topic for project include write up and pictures and present beautifully also includes data charts etc)

6. Make a warli painting to show tribal life and wild life which is created by north sahyadri range of maharastra and Karnataka. (For everyone) HEADS OF ASSESSMENT 1. Explanation 2. Presentation 3. Data collection 4. Exploration, creativity 5. Conclusion

PAGE CONTENT COVER PAGE

Your name,class,section,roll no.,gmail ID, mobile no, Title of Project

1 Table of content (page title) 2 Brief discussion of project, How would you

proceed. 3- 10 Procedure with picture 11 Importance of the content 12 Conclusion /result 13 List of resources 14 Acknowedgement Last page

Declaration “ This Project is done by me independently” Sign by student

Make your project as per given content properly

Last date of Submission : 1-sep-2020

KENDRIYA VIDYALAYA DRDO BANGALORE

Class X Science HOLIDAY HW DEC2020

Section-A

Q. 1 Why do fire flies glows at night? OR Zinc liberates hydrogen gas when reacted with dilute hydrochloric acid, whereas copper does not. Explain why?

Q. 2 What happens when nitric acid is added to egg shell?

Q. 3 Buckminsterfullerene is an allotropic form of (a) phosphorus (b) sulphur (c) carbon (d) tin

Q. 4 How are we able to see nearby and also the distant objects clearly?

Q. 5 Draw a ray diagram showing the path of rays of light when it enters with oblique incidence (i) from air into water; (ii) from water into air

Q. 6 The image formed by a concave mirror is observed to be real, inverted and larger than the object. Where is the object placed? OR Name the part of a lens through which a ray of light passes without suffering any deviation.

Q. 7

In the arrangement shown in figure there are two coils wound on a non-conducting cylindrical rod. Initially the key is not inserted in the circuit. Later the key is inserted and then removed shortly after. What are the two observations that can be noted from the galvanometer reading?

Q. 8 Draw the magnetic field lines around a straight current carrying conductor.

Q. 9 Three 60 W incandescent bulbs are connected in a parallel. (a) Calculate the total power consumed. OR Some work is done to move a charge Q from infinity to a point A in space. The potential of the point A is given as V. What is the work done to move this charge from infinity in terms of Q and V?

Q. 10 Why is ‗nutrition‘ a necessity for an organism?

Q. 11 Why do fishes die when taken out of water? OR What are the adaptations of leaf for photosynthesis?

Q. 12 Why is improper disposal of waste a curse to environment? OR Write the common food chain of a pond ecosystem

Q. 13 Why does absorption of digested food occur mainly in the small intestine?

Q. 14 Assertion: After white washing the walls, a shiny white finish on walls is obtained after two to three days. Reason: Calcium Oxide reacts with Carbon dioxide to form Calcium Hydrogen Carbonate which gives shiny white finish.

Q. 15 Assertion: Food chain is responsible for the entry of harmful chemicals in our bodies. Reason: The length and complexity of food chains vary greatly. OR Assertion: Greater number of individuals are present in lower trophic levels. Reason: The flow of energy is unidirectional.

Q. 16 Assertion: A geneticist crossed a pea plant having violet flowers with a pea plant with white flowers, he got all violet flowers in first generation. Reason: White colour gene is not passed on to next generation

Q. 17 Read the following and answer any four questions from 17 (i) to 17 (v) All living cells require energy for various activities. This energy is available by the breakdown of simple carbohydrates either using oxygen or without using oxygen.

17(i) Energy in the case of higher plants and animals is obtained by a) Breathing b) Tissue respiration c) Organ respiration d) Digestion of food

17 (ii) The graph below represents the blood lactic acid concentration of an athlete during a race of 400 m and shows a peak at point D.

Lactic acid production has occurred in the athlete while running in the 400 m race. Which of the following processes explains this event? a) Aerobic respiration b) Anaerobic respiration c) Fermentation d) Breathing

17 (iii) Study the graph below that represents the amount of energy supplied with respect to the time while an athlete is running at full speed.

Choose the correct combination of plots and justification provided in the following table.

17 (iv) The characteristic processes observed in anaerobic respiration are i) presence of oxygen ii) release of carbon dioxide iii) release of energy iv) release of lactic acid a) i) ,ii) only b) i), ii), iii) only c) ii), iii), iv) only d) iv) only

17 (v) Study the table below and select the row that has the incorrect information

Q. 18 Read the following and answer any four questions from 18 (i) to 18 (v). Metallic Character The ability of an atom to donate electrons and form positive ion (cation) is known as electropositivity or metallic character. Down the group, metallic character increases due to increase in atomic size and across the period, from left to right electropositivity decreases due to decrease in atomic size. Non-Metallic Character The ability of an atom to accept electrons to form a negative ion (anion) is called non-metallic character or electronegativity. The elements having high electro-negativity have a higher tendency to gain electrons and form anion. Down the group, electronegativity decreases due to increase in atomic size and across the period, from left to right electronegativity increases due to decrease in atomic size.

18 (i) Which of the following correctly represents the decreasing order of metallic character of Alkali metals plotted in the graph? a) Cs>Rb>Li>Na>K b) K>Rb>Li>Na>Cs c) Cs>Rb>K>Na>Li d) Cs>K>Rb>Na>Li

18 (ii) Hydrogen is placed along with Alkali metals in the modern periodic table though it shows non-metallic character a) as Hydrogen has one electron & readily loses electron to form negative ion b) as Hydrogen can easily lose one electron like alkali metals to form positive ion c) as Hydrogen can gain one electron easily like Halogens to form negative ion d) as Hydrogen shows the properties of non-metals

18 (iii) Which of the following has highest electronegativity? a) F b) Cl c) Br d) I

18 (iv) Identify the reason for the gradual change in electronegativity in halogens down the group. a) Electronegativity increases down the group due to decrease in atomic size b) Electronegativity decreases down the group due to decrease in tendency to lose electrons c) Electronegativity decreases down the group due to increase in atomic radius/ tendency to gain electron decreases d) Electronegativity increases down the group due to increase in forces of attractions between nucleus & valence electrons

18 (v) Which of the following reason correctly justifies that ―Fluorine (72pm) has smaller atomic radius than Lithium (152pm)‖? a) F and Li are in the same group. Atomic size increases down the group b) F and Li are in the same period. Atomic size increases across the period due to increase in number of shells c) F and Li are in the same group. Atomic size decreases down the group

d) F and Li are in the same period and across the period atomic size/radius decreases from left to right.

Q. 19 Read the following and answer any four questions from 19 (i) to 19 (v) Sumati wanted to see the stars of the night sky. She knows that she needs a telescope to see those distant stars. She finds out that the telescopes, which are made of lenses, are called refracting telescopes and the ones which are made of mirrors are called reflecting telescopes.

So she decided to make a refracting telescope. She bought two lenses, L1 and L2. out of which L1 was bigger and L2 was smaller. The larger lens gathers and bends the light, while the smaller lens magnifies the image. Big, thick lenses are more powerful. So to see far away, she needed a big powerful lens. Unfortunately, she realized that a big lens is very heavy. Heavy lenses are hard to make and difficult to hold in the right place. Also since the light is passing through the lens, the surface of the lens has to be extremely smooth. Any flaws in the lens will change the image. It would be like looking through a dirty window.

19 (i) Based on the diagram shown, what kind of lenses would Sumati need to make the telescope? a) Concave lenses b) Convex lenses c) Bifocal lenses d) Flat lenses

19 (ii) If the powers of the lenses L1 and L2 are in the ratio of 4:1, what would be the ratio of the focal length of L1 and L2? a) 4:1 b) 1:4 c) 2:1 d) 1:1

19 (iii) What is the formula for magnification obtained with a lens? a) Ratio of height of image to height of object b) Double the focal length.

c) Inverse of the radius of curvature. d) Inverse of the object distance.

19 (iv) Sumati did some preliminary experiment with the lenses and found out that the magnification of the eyepiece (L2) is 3. If in her experiment with L2 she found an image at 24 cm from the lens, at what distance did she put the object? a) 72 cm b) 12 cm c) 8 cm d) 6 cm

19 (v) Sumati bought not-so-thick lenses for the telescope and polished them. What advantages, if any, would she have with her choice of lenses? a) She will not have any advantage as even thicker lenses would give clearer images. b) Thicker lenses would have made the telescope easier to handle. c) Not-so-thick lenses would not make the telescope very heavy and also allow considerable amount of light to pass. d) Not-so-thick lenses will give her more magnification.

Q. 20 Read the following and answer any 4 questions from 20 (i) to 20 (v). A solenoid is a long helical coil of wire through which a current is run in order to create a magnetic field. The magnetic field of the solenoid is the superposition of the fields due to the current through each coil. It is nearly uniform inside the solenoid and close to zero outside and is similar to the field of a bar magnet having a north pole at one end and a south pole at the other depending upon the direction of current flow. The magnetic field produced in the solenoid is dependent on a few factors such as, the current in the coil, number of turns per unit length etc. The following graph is obtained by a researcher while doing an experiment to see the variation of the magnetic field with respect to the current in the solenoid. The unit of magnetic field as given in the graph attached is in milli-Tesla (mT) and the current is given in Ampere.

20 (i) What type of energy conversion is observed in a linear solenoid? a. Mechanical to Magnetic b. Electrical to Magnetic c. Electrical to Mechanical d. Magnetic to Mechanical

20 (ii) What will happen if a soft iron bar is placed inside the solenoid? a. The bar will be electrocuted resulting in short-circuit. b. The bar will be magnetised as long as there is current in the circuit. c. The bar will be magnetised permanently. d. The bar will not be affected by any means.

20 (iii) The magnetic field lines produced inside the solenoid are similar to that of … a. a bar magnet b. a straight current carrying conductor c. a circular current carrying loop d. electromagnet of any shape

20 (iv) After analysing the graph a student writes the following statements. I. The magnetic field produced by the solenoid is inversely proportional to the

current. II. The magnetic field produced by the solenoid is directly proportional to the

current. III. The magnetic field produced by the solenoid is directly proportional to square

of the current. IV. The magnetic field produced by the solenoid is independent of the current.

Choose from the following which of the following would be the correct statement(s). a. Only IV b. I and III and IV c. I and II d. Only II

20 (v) From the graph deduce which of the following statements is correct. a. For a current of 0.8A the magnetic field is 13 mT b. For larger currents, the magnetic field increases non-linearly. c. For a current of 0.8A the magnetic field is 1.3 mT d. There is not enough information to find the magnetic field corresponding to 0.8A current.

Section-B

Q. 21 Differentiate between an artery and a vein. Write two differences. OR What will happen if mucus is not secreted by the gastric glands?

Q. 22 Plants have low energy needs as compared to animals. Explain.

Q. 23 Give a test that can be used to confirm the presence of carbon in a compound. With a

valency of 4, how is carbon able to attain noble gas configuration in its compounds? OR The number of carbon compounds is more than those formed by all other elements put together. Justify the statement by giving two reasons.

Q. 24 The following observations were made by a student on treating four metals P, Q, R and S with the given salt solutions:

Based on the above observations: (a) Arrange the given samples in the increasing order of reactivity (b) Write the chemical formulae of products formed when Q reacts with CuSO4 solution.

Q. 25 Is the position of a star as seen by us its true position? Justify your answer.

Q. 26

Three 2Ω resistors, A, B and C, are connected as shown in above figure. Each of them dissipates energy and can withstand a maximum power of 18W without melting. Find the maximum current that can flow through the three resistors?

Section-C

Q. 27 Study the following cross and showing self pollination in F1, fill in the blank and answer the question that follows Parents RRYY x rryy Round, yellow. wrinkled, green F1 — Rr Yy x ? Round, yellow OR

Give reasons for the appearance of new combinations of characters in the F2 progeny

Q. 28 Plastic cups were used to serve tea in trains in early days- these could be returned to the vendors,cleaned and reused. Later, Kulhads were used instead of plastic cups. Now, paper cups are used for serving tea. What are the reasons for the shift from Plastic to Kulhads and then finally to paper cups?

Q. 29 Explain where and how urine is produced?

Q. 30 On heating blue coloured powder of copper (II) nitrate in a boiling tube, copper oxide (black), oxygen gas and a brown gas X is formed (a) Write a balanced chemical equation of the reaction. (b) Identity the brown gas X evolved. (c) Identity the type of reaction.

Q. 31 Name (a) element that has a single electron in their outermost shells. (b) element that has two electrons in their outermost shells. (c) element with filled outermost shells.

Q. 32 a. Explain the formation of Calcium Chloride with the help of electron dot structure. (At numbers: Ca = 20; Cl = 17) b. Why do ionic compounds not conduct electricity in solid state but conduct electricity in molten and aqueous state?

Q. 33 Refractive index of water with respect to air is 1.33 and that of diamond is 2.42. (i) In which medium does the light move faster, water or diamond? (ii) What is the refractive index of diamond with respect to water?

Section-D

Q. 34

In the above diagram for the preparation of hydrogen gas as shown in Figure, what would happen if following changes are made? (a) In place of zinc granules, same amount of zinc dust is taken in the test tube (b) Instead of dilute sulphuric acid, dilute hydrochloric acid is taken (c) In place of zinc, copper turnings are taken

(d) Sodium hydroxide is taken in place of dilute sulphuric acid and the tube is heated. OR A dry pellet of a common base B, when kept in open absorbs moisture and turns sticky. The compound is also a by–product of chloralkali process. 1. Identify B. 2. What type of reaction occurs when B is treated with an acidic oxide? 3.Write a balanced chemical equation for one such solution.

Q. 35 Trace the changes that take place in a flower from gamete formation to fruit formation.

Q. 36 Explain the phenomenon of electromagnetic induction? Describe an appropriate experiment to show that a current is set up in a closed loop when an external magnetic field passing through the loop increases or decreases OR

Find out the following in the electric circuit given in the Figure. (a) Effective resistance of two 8 Ω resistors in combination. (b) Current flowing through 4 Ω resistor. (c) Potential difference across 4 Ω resistor. (d) Power dissipated by 4 Ω resistor. (e) Difference in ammeter readings, if any.

Sample Question Paper – 2 Pg 1 of 5

Sample Question Paper 2016 Science

Class – X (SA – II) Time allowed: 03 Hours Maximum Marks: 90

General Instructions:

(i) The question paper comprises two sections, A and B. You are to attempt both the sections. (ii) All questions are compulsory. (iii) There is no choice in any of the question. (iv) All questions of Section-A and B are to be attempted separately. (v) Question numbers 1 to 3 in Section - A are one mark question. They are to be answered in one

word or in one sentence. (vi) Question numbers 4 to 6 in Section - A are two marks questions. These are to be answered in 30

words each. (vii) Question numbers 7 to 18 in Section - A are three marks questions. These are to be answered in

about 50 words each. (viii) Question numbers 19 to 24 in Section-A are 5 marks questions. These are to be answered in 70

words each. (ix) Question numbers 25 to 33 in Section- B are multiple choice questions based on practical skills.

Each question is a one mark question. You are to select one most appropriate response out of the four provided to you.

(x) Question numbers 34 to 36 in Section B are two marks questions based on practical skills. These are to be answered in brief.

SECTION – A

1 Name the process of converting vegetable oil to vegetable ghee.

1

2 Give reason for the statement- Since the ovary releases one egg every month, the uterus also prepares itself every month by making its lining thick and spongy.

1

3 Name the component of white light that has the greatest wavelength.

1

4 Which natural resource are the „biodiversity hot spots‟? Suggest what happens when there is a loss of biodiversity?

2

5 Write the name and molecular formula of an organic compound having its name suffixed with „–ol‟ and having two carbon atoms in the molecule. With the help of a balanced equation indicate what happens when its heated with excess of conc. H2SO4.

½ + ½ +1

6 A cube of edge 6 cm is placed over a printed page. At what distance from the top surface of cube will the letters appear when seen from above? Refractive index of glass is 1.5

2

7 What is meant by isomers? “We can not have isomers of the first three members of alkane series” give reason to justify this statement. Draw the structures of two isomers of pentane, C5H12

1+1+1

8 i) Name the following:


a) Third member of aldehyde series b) Second member of carboxylic series

ii) Write the IUPAC name of the following:

a) 3

3 3

3

|

|

CH

CH C CH

CH

b)

1 1

½

½

9 Four elements A, B, C and D have atomic numbers 12, 13, 14 and 15 respectively. Answer the following questions giving reasons - i) What is the number of valence electrons and valency of D? ii) Which of them will have largest atomic radii? iii) Which of these elements will form the most basic oxide?

1+1+1

10 Differentiate between combustion and oxidation reactions of ethanol.

3

11 In a germinating seed, which parts are known as future shoot and future root? Mention the function of cotyledon.

3

12 What is placenta? Write any two major functions of placenta.

3

13 „Different species use different strategies to determine sex of a newborn individual. It can be environmental cues or genetically determined‟. Explain the statement by giving example for each strategy.

3

14 A 2 cm high object is placed at a distance of 32 cm from a concave mirror. The image is real, inverted and 3 cm in size. Find the focal length of the mirror and the position where the image is formed?

3

15 A child while playing with his father‟s spectacles burnt a hole in a piece of paper by focusing a small image of the sun on it. (i) What defect of vision his father is suffering from? (ii) Write two causes for this defect? (iii) Draw a ray diagram to show image formation by the defective eye? (iv) Draw a ray diagram showing corrected eye using proper lens.

3

16 Explain the formation of rainbow in the sky with the help of a diagram. List the three phenomena involved in proper sequence.

3

17 Which types of people are benefited from the development of different resources? Why do we need to use the resources carefully?

3

18 Write any three characteristics of a food chain. Dharmesh always treated the chemical effluent before disposing it in the water body. Mention any three moral values possessed by Dharmesh.

3

19 In the following table. Six elements A, B, C, D, E and F of the modern periodic table with atomic numbers 3 to 18 are given:

1+1+1+1+1


3 4 5 6 7 8 9 10 A E G 11 12 13 14 15 16 17 18 B C D F

a) Which of these is i) Noble gas ii) halogen b) Which of these is the most active metal in 3rd period? c) Identify the most electronegative element in the third period. d) In the compound between B and F what type of bond will be formed? e) What would be the nature of oxide formed by C?

20 A. Draw a longitudinal section of a flower and label the following parts – a) Part that develops into a fruit b) Part that produces pollen grain c) Part that transfers male gametes d) Part that is sticky to trap

B. Name the parts labeled A, B, C, D in the diagram given below:

5

21 A. How does speciation take place? B. Define the term GENE. C. The gene for red hair is recessive to the gene for black hair. What will be the

hair colour of a child if he inherits a gene for red colour from his mother and a gene for black hair from his father? Express with the help of flow chart.

5

22 A. Mention any two point of difference between acquired and inherited traits. B. If the tail of a mouse is cut for twenty one generations, will the tail occur in

the twenty second generation of that mouse? Give reason to support your answer.

C. Define the term – Natural Selection.

5

SECTION B 23 (i) Rohit claims to have obtained an image twice the size of object with a

concave lens. Is he correct? Give reason for your answer. (ii) Where should an object be placed in case of a convex lens to form an image

of same size as of the object? Show with the help of ray diagram the position and the nature of the image formed.

(iii) With the help of ray diagram, illustrate the change in position, nature and size of the image formed if the convex lens in case of (ii) is replaced by concave lens of same focal length.

5

24 (i) Which property of concave mirror is utilized for using them as shaving mirrors?

(ii) Light passes through a rectangular glass slab and through a triangular glass prism. Using proper ray diagram, explain in what way does the direction of the two emergent beams differs with respect to the incident beam of light.

(iii) A concave lens has a focal length of 50 cm Calculate its power.

5


25 A student is given equal amount of three samples A, B and C of water with temporary hardness. He keeps the three samples at different temperatures. A at room temperature, B at 50oC and C at 80oC. Which sample will give maximum amount of lather with soap solution?

a) A b) Both B and C c) Only C d) Both A and B

1

26 Soaps are formed by alkaline hydrolysis of a) Carboxylic acids b) Esters of long chain fatty acids c) Esters of small chain d) Inorganic acids

1

27 On addition of Na2CO3 to hard water a) the foaming capacity increases b) the foaming capacity decreases c) the foaming capacity increases then decreases d) the foaming capacity decreases then increases

1

28 In finding the focal length of a distant object by concave mirror, you are required to draw the ray diagram of nature.

1

29 While performing the experiment to trace the path of a ray of light passing through a rectangular glass slab, four students labeled their ray diagrams in the manner shown below. The correct labeling has been done by students.

1

30 A convex lens forms a virtual image when an object is placed at a distance of 20cm from it. The focal length

(a) f = 40 cm (b) f = 20 cm (c) f > 20 cm (d) f < 20 cm

1


31 In a dicot seed, the pore through which the seed absorbs water during seed germination is called

a) Micropyle b) Hilum c) Funicle d) Radical

1

32 For the experiment – To prepare temporary mount of yeast to study budding process; Yeast granules are made to first grow by adding them to

a) Hydrochloric acid b) Distilled water c) 10% sugar solution d) Alcohol

1

33 Two slides were shown to four students, and they labeled them as following.

Student Slide A Slide B

I II III IV

Budding in Yeast Binary fission in Amoeba Binary fission in Amoeba Budding in Amoeba

Binary fusion in Amoeba Buds of Amoeba Daughter cells of Amoeba Daughter cell of Yeast

The student who made the correct labeling is:

a) II b) I c) IV d) III

1

34 With regard to turnip, carrot, sweet potato and potato, three belong to the same category. Identify those three modifications and mention whether they are homologous or analogous. Also mention the reason why the fourth modifications do not belong to the same category.

2

35 A student has to perform an experiment on tracing the path of a ray of light passing through a rectangular glass slab for three different angles of incidence. Two of his friends suggest the following options to him:

(A) Draw the incident rays corresponding to 20o, 50o and 70o as angles of incidence and fix the two pins on the incident ray just 2 cm apart.

(B) Draw the incident rays corresponding to 30o, 45o and 60o as the angles of incidence and fix two pins on the incident rays nearly 8 cm apart. Which is the better option he should follow? Give reason in support of your answer.

2

36 A student obtained a sharp image of a lighted candle on a screen using a convex lens. Now he wants to focus a distant lamp on a far away electric pole. In which direction should the lens be move for this purpose with respect to the screen, to get a sharp image on the screen? Justify your answer.

2

Sample Question Paper 2016 – 17 Science

Class – X (SA – II) Time allowed: 03 Hours Maximum Marks: 90


(i) The question paper comprises two sections, A and B. You are to attempt both the sections. (ii) All questions are compulsory. (iii) There is no choice in any of the question. (iv) All questions of Section-A and B are to be attempted separately. (v) Question numbers 1 to 3 in Section-A are one mark question. They are to be answered in one word

or in one sentence. (vi) Question numbers 4 to 6 in Section- A are two marks questions. These are to be answered in 30

words each. (vii) Question numbers 7 to 18 in Section-A are three marks questions. These are to be answered in

about 50 words each. (viii) Question numbers 19 to 24 in Section-A are 5 marks questions. These are to be answered in 70

words each. (ix) Question numbers 25 to 33 in Section- B are multiple choice questions based on practical skills.

Each question is a one mark question. You are to select one most appropriate response out of the four provided to you.

(x) Question numbers 34 to 36 in Section B are two marks questions based on practical skills. These are to be answered in brief.

Section A

1 Name the process of converting vegetable oil to vegetable ghee. 1

2 List two secondary sexual characters of males that are different from that of females.

1

3 Write the main function of Ozone in the upper atmosphere 1

4 When a concave mirror is placed facing the Sun, the Sun’s rays converge to a point 10 cm from the mirror. Now, if you place a 2 cm long candles flame 20 cm away on the principal axis of the mirror, where would you place a screen to obtain the image of the candle? What would see the size of the image? Draw a ray diagram to justify your answer.

2

5 If you find coliform bacteria in a sample of water collected from a river, what would you conclude? Give reason for such kind of water pollution.

2

6 Which natural resources are called the “biodiversity hot spots”? How these hot spots maintain ecological balance?

2

7 What are isomers? “Isomers of the first three members of alkane series are not possible”. Give reason to justify this statement and draw structures of two isomers of butane, C4 H10.

3

8 An organic compound ‘X’ is a liquid at room temperature. It is also a very good solvent and has the molecular formula C2 H6 O. on oxidation ‘X’ gives ‘Y’ which give, break effervescence on reacting with NaHCO3. X reacts with Y in the presence of conc.H2SO4to give another compound ‘Z’ which has a pleasant smell. Identify X, Y

3

and Z. also write chemical equations to show the formation of Y and Z.

9 An element ‘A’ belongs to 3rd period and 17th group of the periodic table. a) Write atomic member and electronic configuration of ‘A’ b) State whether A is a metal or a non – metal. c) Write the nature of bond formed if A reacts with another element B of

electronic configuration 2, 8, 1. d) Write the chemical formula of the compound formed.

3

10 Consider the following elements 4Be, 9F, 19K, 20Ca

a) Select the element having one election in the outer most shell. b) Select two elements of the same group. c) Write the formula and state the nature of the Compound formed when the

element K reacts with an element X of electronic configuration 2, 8, 7.

3

11 Explain with the help of labelled diagrams the development that takes place in each of the body parts of a Planaria where body is cut into three pieces. None this process and give an example of an organism in which a similar process can be observed.

3

12 List any four methods of contraception used by humans. How does the use of three methods have a direct effect on the heath and prosperity of a family?

3

13 List two functions each of the following points of human female reproductive system a) Ovaries b) Fallopian tubes c) Uterus

3

14 “Different species use different strategies to determine sex of a new born individual. It can be environmental cues or genetically determined”. Justify this statement giving reason/example.

3

15 List in tabular form, two distinguishing features between the acquired traits and the inherited traits with one example of each.

3

16 A student has to project a three times magnified image of a candle flame on a wall. Name the type of the lens (converging/ diverging) required for the purpose. It the candle flame is at a distance of 6 m from the wall, find the focal length of the lens.

3

17 A child while playing with his father’s spectacles burnt a hole in a piece of them tissue paper by focusing the image of the Sun on at.

a) Name the defect of vision his father is suffering form. b) List two causes of the defect. c) Draw a ray diagram to show how this defect may be corrected using a

suitable lens.

3

18 Some residents of your colony are planning to cut trees to create a place for parking vehicles. You are upset by knowing all this and wanted to do something to create awareness about the importance of trees. (a) List any three reasons that you will use to convince residents of your colony not to cut the existing trees. (b) List any three values that would be inculcated amongst them with such approach.

3

19 a) State two main reasons for carbon forming a very large number of compounds.

b) Give reason why carbon forms compound (i) Namely by Covalent bonding (ii) Having low melting and boiling points

c) What happens when (Write chemical equations of the reactions) (i) A piece of sodium metal is added to ethanol. (ii) Ethanoic acid reacts with sodium hydroxide.

5

20 A. Draw a longitudinal section of a flower and label the following parts – a) Part that develops into a fruit b) Part that produces pollen grain c) Part that transfers male gametes d) Part that is sticky to trap

B. Write the names of the parts labeled as A, B, C, D in the diagram given below:

5

21 A. How does speciation take place? B. Define the term GENE. C. The gene for red hair is recessive to the gene for black hair. What will be the

hair colour of a child if he inherits a gene for red colour from his mother and a gene for black hair from his father? Express with the help of flow chart.

5

22 A. Explain the formation of rainbow in the sky with the help of a diagram. List the three phenomena of light involved. Which colour – violet or red appears at top of the rainbow?

B. What is the difference in colours of the sun observed during sunrise/sunset and noon? Give explanation for each.

5

23 (i) Which property of concave mirror is utilized for using them as shaving mirrors? (ii) Light passes through a rectangular glass slab and through a triangular glass

prism. Using proper ray diagram, explain in what way does the direction of the two emergent beams differs with respect to the incident beam of light.

(iii) A concave lens has a focal length of 50 cm Calculate its power.

5

24 (i) Rohit claims to have obtained an image twice the size of object with a concave lens. Is he correct? Give reason for your answer.

(ii) Where should an object be placed in case of a convex lens to form an image of same size as of the object? Show with the help of ray diagram the position and the nature of the image formed.

(iii) With the help of ray diagram, illustrate the change in position, nature and size of the image formed if the convex lens in case of (ii) is replaced by concave lens of same focal length.

5

Section B

25 In the preparation of soap, sodium chloride causes: (a) complete saponification. (b) complete hydrolysis. (c) complete neutralization. (d) complete precipitation.

1

26 Vishakha carried out saponification reaction in the lab and she gave following comments as:

(i) Soap is salt of fatly acid. (ii) Heat is absorbed in this reaction. (iii) Reaction mixture is basic in nature (iv) These are neutralization reaction

The correct statements are: (a) (i) & (iii) (b) (ii) & (iv) (c) (i) & (ii) (d) (i), (ii) & (iii)

1

27 Select from the following salts which may be used to prepare hard water required for the experiment.

A. CaSO4 B. Na2SO4 C. CaCl2 D. K2SO4 E. NaHCO3 F. MgCl2

1. A, B and D 2. A, C and F 3. B, D and E 4. C, E and F

1

28 Four students A,B,C and D did their experiment of finding the focal length of convex lens by obtaining image of a distant object as follows:

x Student A used the window grill in the laboratory as the object and a white paper sheet held in hand as the screen.

x Student B used a distant tree in the shade and a white thick held in a stand as the screen.

x Student C used a well illuminated laboratory window grill as the object and a white paper sheet held in a stand as the screen.

x Student D used a well illuminated distant tree as the object and a white thick board held in a stand as the screen.

Which student has used the correct method for performing experiment out of the above setups?

(a) A (b) B (c) C (d) D

1

29 In the setup shown below, a clear image of a distant object is obtained on the screen. The focal length of the concave mirror is:

(a) 11.4 cm (b) 9.4 cm (c) 9.8cm (d) 9.9cm

1

30 In the experiment on refraction of light through a rectangular glass slab done by four students A, B, C and D, the following observations were made: (A) The emergent ray moves towards the normal after second refraction through glass slab with i = e (B) The emergent ray moves away from the normal after second refraction through glass slab i e (C ) For any angle of incidence, always I ˃ e, always. (d) The emergent ray moves away from normal after second refraction through glass slab with i=e The student who has made the correct observation is: (a) (A) (b) (B) (c ) (C ) (d) (D)

1

31 To trace the path of ray of light through the triangular glass prism, a student observes that the emergent ray has (a) bent away from the base of the prism (b) bent towards the base of the prism (c ) moved parallel to the direction of incident ray (d) gone perpendicular to incident ray.

1

32 The diagrams A and B represents the following relationship:

(a) homologous organs (b) analogous organs ( c) vestigial organs (d) rudimentary organs

1

33 Identify the parts labeled 1 and 2 in the adjoining figure.

(a) 1- micropyle, 2- epicotyls (b) 1- cotyledon, 2- embryo (c ) 1-radicle , 2-plumule (d) 1-plumule, 2-radicles

1

34 When you add sodium hydrogen carbonate to acetic acid in a test tube, a gas liberates immediately with a brisk effervescence. None the gas and describe the method of its testing in the laboratory.

2

35 Mention about the four events that occur during binary fission in amoeba. 2

36 A student obtained a sharp image of a lighted candle on a screen using a convex lens. Now he wants to focus a distant lamp on a far away electric pole. In which direction should the lens be moved for this purpose with respect to the screen, to get a sharp image on the screen? Justify your answer.

2

Pg1 of 4

Sample Question Paper 2017-18 Science

Class – X Time allowed: 03 Hours Maximum Marks: 80


(i) The question paper comprises two sections, A and B. You are to attempt both thesections.

(ii) All questions are compulsory.(iii) All questions of Section-A and B are to be attempted separately.(iv) There is an internal choice in three questions of three marks each, two questions of

five marks each and one question of two marks each.(v) Question numbers 1 and 2 in Section-A are one mark question. They are to be

answered in one word or in one sentence.(vi) Question numbers 3 to 5 in Section- A are two marks questions. These are to be

answered in 30 words each.(vii) Question numbers 6 to 15 in Section-A are three marks questions. These are to be

answered in about 50 words each.(viii) Question numbers 16 to 21 in Section-A are 5 marks questions. These are to be

answered in 70 words each.(ix) Question numbers 22 to 27 in Section- B are based on practical skills. Each question is

a two marks question. These are to be answered in brief.

SECTION – A 1 Give an example of a flower which contains both stamens and carpels. 1 2 Mention any one point of difference between Pepsin and Trypsin. 1 3. An element “X” has mass number 35 and the number of neutrons, is 18. Identify

the group number and period of “X”. 2

4. An object of height 1.2m is placed before a concave mirror of focal length 20cm so that a real image is formed at a distance of 60cm from it. Find the position of an object. What will be the height of the image formed?

2

5. Why is there a need to harness non-conventional sources of energy? Give two main reasons.

2

6 Name the electric device that converts mechanical energy into electrical energy. Draw the labelled diagram and explain the principle involved in this device.

OR i) What is the function of earth wire in electrical instruments?ii) Explain what is short circuiting an electric supply.iii) What is the usual current rating of the fuse wire in the line to feed

(a) Lights and fans? (b) Appliances of 2kW or more power?

3

7 Draw a circuit diagram of an electric circuit containing a cell, a key , an ammeter , a resistor of 4Ω in series with a combination of two resistors (8Ω each) in parallel and a voltmeter across parallel combination. Each of them dissipate maximum energy and can withstand a maximum power of 16W without melting. Find the maximum current that can flow through the three resistors.

3

8 In the electrolysis of water, a) Name the gas collected at anode and cathodeb) Why is the volume of gas collected at one electrode double than the other?c) What would happen if dil H2SO4 is not added to water?

3

9 Differentiate between the arrangement of elements in Mendeleev’s periodic table and Modern periodic table.

3

Pg2 of 4

10 Explain the ways in which glucose is broken down in absence of oxygen. OR

List three differences between arteries and veins.

3

11 How do Mendel’s experiments show that traits may be dominant or recessive? 3 12 Rohit focused the image of a candle flame on a white screen using a convex lens.

He noted down the position of the candle , screen and lens as under : Position of candle = 26.0 cm Position of convex lens = 50.0 cm Position of screen = 74.0 cm i) What is the focal length of the convex lens? ii) Where will the image be formed if he shifts the candle towards the lens at a

position of 38 cm? iii) Draw a ray diagram to show the formation of the image in case (ii) as said

above?

3

13 “pH has a great importance in our daily life” explain by giving three examples. OR

A compound which is prepared from gypsum has the property of hardening when mixed with a proper quantity of water. Identify the compound and write its chemical formula. Write the chemical equation for its preparation. Mention any one use of the compound.

3

14 Why are fossils considered important in the study of evolution? Explain two ways by which age of fossils can be estimated.

3

15 Our government launches campaigns to provide information about AIDS prevention, testing and treatment by putting posters, conducting radio shows and using other agencies of advertisements.

a) To which category of diseases AIDS belong? Name its causative organism. b) Which kind of value is government trying to develop in the citizens by

conducting the above kind of programs.

3

16 With the help of a labelled circuit diagram wire describe an activity to illustrate the pattern of the magnetic field lines around a straight current carrying long conducting wire .

i) Name the rule that is used to find the direction of magnetic field associated with a current carrying conductor.

ii) Is there a similar magnetic field produced around a thin beam of moving (a) alpha particles and (b) neutrons? Justify your answer.

5

17 You are given balls and stick model of six carbon atoms and fourteen hydrogen atoms and sufficient number of sticks. In how many ways one can join the models of six carbon atoms and fourteen hydrogen atoms to form different molecules of C6H14.

OR Draw the structural formulae of all the possible isomers of the compound with the molecular formula C3H6O and also give their electron dot structures.

5

18 a) i) Draw a neat diagram of human brain and ii) Label Medulla and Cerebellum iii) Write the functions of the above mentioned parts

b) ”Both overproduction and underproduction of Growth hormone leads to disorders in the body.” Explain

5

Pg3 of 4

19 Noopur needs a lens of power -4.5D for correction of her vision. a) What kind of defect in vision is she suffering from? b) What is the focal length and nature of the corrective lens? c) Draw ray diagrams showing the (a) defected eye and (b) correction for this

defect. d) What are the causes of this defect?

5

20 a) What is reactivity series? How does the reactivity series of metals help in predicting the relative activities of various metals?

b) Suggest different chemical processes used for obtaining a metal from its oxides for metals in the middle of the reactivity series and metals towards the top of the reactivity series. Support your answer with one example each.

5

21 a) “Improvements in our lifestyle have resulted in greater amounts of waste generation.” Give two examples to support the given statement. Suggest one change that we can incorporate in our lifestyle in order to reduce non-biodegradable waste.

b) The following organisms form a food chain. Insect, Hawk, Grass, Snake, Frog

Which of these will have highest concentration of non-biodegradable chemicals? Name the phenomenon.

OR a) What do you understand by “Watershed Management”? List any two

advantages of watershed management. b) “Human beings occupy the top level in any food chain.” What are the

consequences of this on our body?

5

SECTION – B

22 What do you observe when you drop a few drops of acetic acid to a test tube containing:

a) Phenolphthalein c) distilled water b) Universal indicator d) sodium hydrogen carbonate

2

23 Riya performs two set of experiments to study the length of the foam formed which are as follows: Set I: she takes 10 ml of distilled water in test tube “A” and adds 5-6 drops of liquid soap in it and shakes the test tube vigorously. Set II: she takes 10 ml of distilled water in a test tube “A” and adds 5-6 drops of liquid soap with half spoonful of CaSO4 in it and shakes the test tube. Write your observation and reason.

2

24 A student observed a permanent slide showing asexual reproduction in yeast. Draw diagrams of the observations he must have made from the slide. Name the process also.

2

25 A student conducted an experiment to show CO2 is released during respiration. List two precautions that he/she must take for obtaining correct observations.

2

26 The values of current I flowing in a given resistor for the corresponding values of potential difference V across the resistor are given below:

I (ampere) 0.5 1.0 2.0 3.0 4.0 V (volt) 1.6 3.4 6.7 10.2 13.2

2

Pg4 of 4

Plot a graph between V and I and calculate the resistance of the resistor.

OR In a given ammeter, a student sees that needle indicates 17 divisions in ammeter while performing an experiment to verify Ohm’s law. If ammeter has 10 divisions between 0 and 0.5A, then what is the value corresponding to 17 divisions?

27 Draw a path of light ray passing through a prism. Label angle of incidence and angle of deviation in the ray diagram.

2

Class-X Science-086

SAMPLE QUESTION PAPER-19

TIME: 3 Hrs. M.M.:80


(i) The question paper comprises of five sections – A, B, C, D and E. You are to attempt all the sections. (ii) All questions are compulsory. (iii) Internal choice is given in sections B, C, D and E. (iv) Question numbers 1 and 2 in Section-A are one mark questions. They are to be answered in one word

or in one sentence. (v) Question numbers 3 to 5 in Section- B are two marks questions. These are to be answered in about 30

words each. (vi) Question numbers 6 to 15 in Section-C are three marks questions. These are to be answered in about

50 words each. (vii) Question numbers 16 to 21 in Section-D are 5 marks questions. These are to be answered in about 70

words each. (viii) Question numbers 22 to 27 in Section- E are based on practical skills. Each question is a two marks

question. These are to be answered in brief.

SECTION A

1. Name a common nutrient that is absorbed in the small intestine and reabsorbed by the kidney tubules. 1

2. The presence of a particular group of bacteria in water bodies indicates contamination. Identify the group. 1

SECTION B

3. How is Magnesium Chloride formed by the transfer of electrons? Why does the solution of Magnesium chloride conduct electricity? 2

4. In a flowering plant, summarize the events that take place after fertilization. 2

5. A ray of light enters into benzene from air. If the refractive index of benzene is 1.50, by what percent does the speed of light reduce on entering the benzene? 2

OR

For the same angle of incidence in media A,B and C, the angles of refraction are 200, 300 and 400 respectively. In which medium will the velocity of light be maximum? Give reason in support of your answer.

6. What happens when aqueous solutions of Sodium sulphate and Barium chloride are mixed? Give a balanced equation for the reaction with state symbols. Name and define the type of chemical reaction involved in the above change. 2

SECTION C

7. Identify the compound of calcium which is used for plastering of fractured bones. With the help of chemical equation show how is it prepared and what special precautions should be taken during the preparation of this compound. 3

OR

‘Sweet tooth may lead to tooth decay’. Explain why? What is the role of tooth paste in preventing cavities?

8. The electronic configuration of an element ‘X’ is 2,8,6. To which group and period of the modern periodic table does ‘X’ belong .State it valency and justify your answer in each case. 3

9. Pertaining to endocrine system, what will you interpret if- 3

i) You observe swollen neck in people living in the hills ii) Over secretion of Growth Hormone takes place during childhood iii) Facial hair develops in boys aged 13. 10. A variegated leaf with green and yellow patches in used for an experiment to prove that chlorophyll is required for photosynthesis. Before the experiment the green portions (A), and the pale yellow portions (B), are observed. What will be the colour of ‘A’ just before and after the starch test? Also write the equation of photosynthesis and mark, as well as validate from which molecule the by-product is obtained. 3

11. The image of an object formed by a mirror is real, inverted and is of magnification -1. If the image is at the distance of 30 cm from the mirror, where is the object placed? Find the position of the image if the object is now moved 20 cm towards the mirror. What is the nature of the image obtained? Justify your answer with the help of ray diagram. 3

OR

What is meant by power of a lens? You have three lenses L1, L2 and L3 of powers +10D, +5D and -10D respectively. State the nature and focal length of each lens. Explain which of the three lenses will form a virtual and magnified image of an object placed at 15 cm from the lens. Draw the ray diagram in support of your answer. 12. Two lamps, one rated 100 W at 220 V and the other 200 W at 220V are connected (i) in series and (ii) in parallel to electric main supply of 220V. Find the current drawn in each case. 3

13. The figure below shows three cylindrical copper conductors along with their face areas and lengths. Compare the resistance and the resistivity of the three conductors. Justify your answer. 3

3 14. What is biogas? Describe the steps involved in obtaining biogas. 3 15. How is ozone both beneficial and damaging? How can depletion of ozone layer be prevented? 3

OR

The flow of energy between various components of the environment has been extensively studied. List four findings.

SECTION D

16. a) How will you show experimentally that metals are good conductors of heat. 5 b) Describe the extraction of Mercury metal from its ore Cinnabar (HgS). 17. A compound A (C2H4O2) reacts with Na metal to form a compound ‘B’ and evolves a gas which burns with a pop sound. Compound ‘A’ on treatment with an alcohol ‘C’ in presence of an acid forms a sweet smelling compound ‘D’ (C4H8O2). On addition of NaOH to ‘D’ gives back B and C. Identify A, B, C and D write the reactions involved. 5

OR

a) Explain why carbon forms covalent bond? Give two reasons for carbon forming a large number of compounds.

b) Explain the formation of ammonia molecule.

18. a) Draw the diagram of female reproductive system and match and mark the part(s): 5 i) Where block is created surgically to prevent fertilization. ii) Where Copper-T is inserted? iii) Inside which condom can be placed. b) Why do more and more people prefer to use condoms? What is the principle behind use of condoms? 19. Name the phenomenon that governs the following: - 5

i) Green beetles living in green bushes are not eaten by the crows. ii) Number of blue beetles in green bushes increases, only because the red beetles living there were trampled by a

herd of elephants.

L

A

(a)

A/3

3L

(b)

(c)

L/3

3A

iii) No ‘medium height plants’ are obtained in F1 generation, upon crossing pure tall and dwarf pea plants. iv) Tails of mice were surgically removed for several generations; still mice had tails in the following generations. v) A migrant beetle reproduces with the local population; as a result genes of migrant beetle enter the new population.

OR

a) What are fossils and how is age of fossils determined? b) During artificial selection, which features of wild cabbage were selected to give rise to i) Cabbage ii) Cauliflower

20. (a)What is meant by the term ‘power of accommodation’? Name the component of eye that is responsible for the power of accommodation. 5

(b) A student sitting at the back bench in a class has difficulty in reading. What could be his defect of vision? Draw ray diagrams to illustrate the image formation of the blackboard when he is seated at the (i) back seat (ii) front seat. State two possible causes of this defect. Explain the method of correcting this defect with the help of a ray diagram.

21. (i) With the help of an activity, explain the method of inducing electric current in a coil with a moving magnet. State the rule used to find the direction of electric current thus generated in the coil. 5

(ii) Two circular coils-1 and coil-2 are kept close to each other as shown in the diagram.Coil-1 is connected to a battery and key and coil-2with a galvanometer. State your observation in the galvanometer:

(a) When key K closed ; (b) when key K is opened; Give reason for your observations.

OR

Name a device which converts mechanical energy into electrical energy. Explain the underlying principle and working of this device with the help of a labelled diagram.

SECTION E

22. When few drops of phenolphthalein are added to a dilute solution of sodium hydroxide a pink colour is produced. What will be the colour of the final

mixture when excess of HCl is added to it? (justify your

answer) 2

OR

Arrange the metals iron, magnesium, zinc and copper in the increasing order of their reactivity.

What will be the two observations made by the student when iron filings are added to copper sulphate solution? 2

23. From an experiment to study the properties of acetic acid. Answer the following questions: 2

a) Name the substances which on addition to acetic acid produce carbon dioxide gas. Give relevant chemical equation for the above?

b) How is CO2 gas tested in the laboratory?

24. When observed under high power of the microscope, ‘chain of buds’ is visible in the2 microscopic view. In which organism can it be observed? Explain the process.

OR In the experimental set up on ‘CO2 is released during respiration,’ if one forgets to keep the vial with KOH in the conical flask, how will the result vary? Give details. 2

25. You soak seeds of bean and observe them after 2-3 days. Lit four observations? 2

26. The current flowing through a resistor connected in an electrical circuit and the potential difference developed across its ends are shown in the given ammeter and voltmeter. Find the least count of the voltmeter and ammeter .What is the voltage and the current across the given resistor? 2

27. Consider the path of a ray of light passing through a rectangular glass slab for different angles of incidence. (i) Which one is greater: angle of incidence or angle of refraction? (ii) What happens to the emergent angle on increasing the incident angle at air-glass interface? (iii) State the conditions when no bending occurs. 2

OR

Sunita takes a mirror which is depressed at the centre and mounts it on a mirror stand. An erect and enlarged image of her face is formed. She places the mirror on a stand along a meter scale at 15 cm mark. In front of this mirror, she mounts a white screen and moves it back and forth along the meter scale till a sharp, well-defined inverted image of a distant tree is formed on the screen at 35 cm mark.

(i) Name the mirror and find its focal length.

(ii) Why does Sunita get sharp image of the distant building at 35 cm mark?

WINTER BREAK HOLIDAY HOMEWORK SOCIAL SCIENCE CLASS X

Art integrated project paired with Uttrakhand .( Project should be interdisciplinary and as per discussed in the class.) Suggested topics are -Artefacts of Uttarakhand,Dance forms of Uttarakhand,Tribes of Uttrakhand Paintings of Uttrakhand,Monuments of Uttarakhand ,Flora and Fauna of Uttarakhand ,Cuisine of Uttarakhand.

Write and solve two sample papers in your notebook .Sample papers which will be shared in your whatsapp group by your subject teacher .

CLASS X COMBINED WINTER BREAK HHW.pdf - KENDRIYA ...

Documents

Transcript of CLASS X COMBINED WINTER BREAK HHW.pdf - KENDRIYA ...