Summer break homework - 2015
Class X
Maths
Q.1 The decimal expansion of the rational number 43/24 53 will terminate after how many places of decimals.
Q.2 Prove that √5 is an irrational number
Q.3 Find the [HCF * LCM] for the number 100 and 190
Q.4 Prove that 5 -2√3 is an irrational number
Q.5 Use Euclids’s division lemma. Show that the cube of any positive integer is of the form 9q, 9q + 1 or 9q+8 for
some integer q
Q.6 The HCF and LCM of two numbers are 9 and 360 respectively. If one number is 45. Write the other number.
Q.7 Find the quadratic polynomials, sum of whose zeros is 8 and their products is 12. Hence, find the zeros of the
polynomial.
Q.8 Write the zeros of the polynomial 𝑥 2 + 2𝑥 + 1.
Q.9 Find the zeros of the quadratic polynomial 2𝑥 2 − 3 − 7𝑥 and verify the relationship between the zeros and
coefficients of the polynomial.
Q.10 Find the zeros of the quadratic polynomial 5𝑥 2 − 4 − 8𝑥 and verify the relationship between the zeros and
coefficients of the polynomial.
Q.11 Obtain all other zeros of the polynomial 2x3 - 4x – x2 + 2 if two of its zeros are √2 and -√2.
Q.12 Find the quadratic polynomial whose zeros are 1 and -3 .Verify the relationship between the zeros and
coefficients of the polynomial.
Q.13 Using division algorithm, find the quotient and remainder on dividing f(x) by g(x), where
f(x)= 6x3 + 3x2 + x -2 and g(x)= 2x + 1
Q.14 Find all zeros of the polynomial x4 + x3 -34x2 – 4x + 120 , if two of it’s zeros are 2 and -2
Q.15. Write the history of any 3 mathematicians whom you like very much and their contributions to mathematics .(
coloured A4 size pastel sheets ).
Q 16. Make a power point presentation on any one chapter given in term 1.
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English Communicative
Reading
Read the following novel and write its book review:
The Story of My Life by Hellen Keller.
Writing
1. You are Naresh. You happen to go to Agra in a crowded bus on a hot summer day. Record your
experience in the form of a paragraph.
2. Write a debate either for or against the motion on ‘Modern living has made Indian people sick,
unhealthy and disease prone’. (150-180 words)
3. As we neared the airport, we saw a crowd on the highway. We stopped our vehicle wondering what
it was…………..Complete the story in 120-150 words, in a suitable manner.
4. Imagine yourself to be one of the survivors of recently occurred ‘Nepal Earthquake’. Write a page in
your diary describing your ordeal with the calamity.
Grammar
Look at the words and phrases below. Rearrange them to form meaningful sentences:
(a). officials/a hand-held/bacteria/the method/device/allows/to detect/with.
(b). bacteria killers/naturally/the technique/bacteriophages/is based on/ occurring/known as.
(c). to antibiotics/have been shown/of an/by bacteriophages/to destroy anthrax/ that has become
resistant/to extract/enzyme product.
(d). this technique/infections/in a/help/few years/may fight/difficult to treat.
Literature
Revise the lessons taught & learnt in Fiction and Poetry sections.
Physics
1.
2.
3.
4.
5.
6.
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Draw symbols of different components used in electric circuit.
Write power of the appliances used in your house.
Write capacity of electric current of different of different appliances and wires of your house.
Write atleast five ways to save electricity in your home.
How will you suggest role of green energy to conserve the energy sources.
Make a working model for Jawahar Lal Nehru Science Exhibition.
Chemistry
1. Why oil and fats containing food items are flushed with nitrogen?
2. How will you test for the gas which liberated when hydrochloric acid reacts with active metal?
3. Write the different types of chemical reactions and explain them with examples.
4. Why is respiration considered as an exothermic reaction?
5. Write the balanced chemical equation:
(a) nitrogen gas is treated with hydrogen gas in presence of catalyst at 773K to form ammonia gas.
(b) Ethanol is warmed with ethanoic acid to form ethyl acetate in presence of Con. Sulphuric Acid.
(c) Sodium hydroxide solution is treated with acetic acid solution to form sodium acetate and water.
(d) Ethane is burnt in presence of oxygen to form carbon dioxide and water.
(e) Phosphorus burns in oxygen to give phosphorus penta oxide.
(f) Barium chloride reacts with zinc sulphate to give barium sulphate and zinc chloride.
6. What happens when:
(a) Lead nitrate is heated.
(b) Lead nitrate solution is reacted with potassium iodide solution.
(c) Calcium carbonate is heated.
(d) Iron reacts with saline water.
7. What is the difference between displacement and double displacement reaction?
8. In electrolysis of water:
(a) name the gas collected at cathode and anode
(b) why few drops of Dil acid is added to water.
9. What are redox reactions? Identify the oxidized and reduced substance in following reactions:
(a) magnesedioxide reacts with hydrochloric acid.
(b) Cupric oxide reacts with hydrogen gas.
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BIOLOGY
1. MAKE A NEWSLETTER SHOWING CURRENT HAPPENINGS IN THE FIELD OF BIOLOGY. ALSO
MENTION THE DATE AND SOURCE OF NEWS.
2. ANSWER THE FOLLOWING QUESTIONS
A. WHAT HAPPENS IF MUCUS IS NOT SECRETED BY THE GASTRIC GLANDS?
B. EXPLAIN THE MECHANISM OF BREATHING.
C. DESCRIBE DOUBLE CIRCULATION IN HUMAN BEINGS. WHY IS IT NECESSARY?
D. DESCRIBE THE PROCESS OF URINE FORMATION IN KIDNEYS.
E. WHEN A SPORTSMAN RUNS, HE OFTEN GETS MUSCLE CRAMPS. WHY?
F. DIFFERENTIATE BETWEEN
i. ARTERY AND VEIN
ii. AUTOTROPHIC AND HETEROTROPHIC NUTRITION
iii. AEROBIC AND ANAEROBIC RESPIRATION
iv.
PARASITE AND HOST.
G. DRAW NEAT AND WELL LABELED DIAGRAM OF :
i. HUMAN DIGESTIVE SYSTEM
ii. HUMAN RESPIRATORY SYSTEM
iii. HUMAN HEART
iv.
HUMAN EXCRETORY SYSTEM
v.
NEPHRON
Hindi
प्रश्न: 1- किसी एि विषय पर ननबंध लिखिए |
1- मेरे जीिन िा िक्ष्य
2- पयाािरण िे प्रनि हमारा ििाव्य
प्रश्न :2 दो सिारात्मि समाचार पढ़िर उस पर अपने विचार व्यक्ि िीजजये |
प्रश्न: 3
दस हहंदी
पत्र - पत्रत्रिाओं िे नाम िथा उनिे संपादि िे नाम भी लिखिए |
SST
1. Prepare a project on natural and man-made disasters and methods of mitigation.
2. Make a list of authors along with their publication and its date from the chapter novels ,society and
history.
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3. Show any ten national parks on the outline map of India in your activity file .
4. Show five wildlife sanctuary and five bird sanctuary on the outline map of India in your activity file .
5. Define the following .
(i)GDP
(ii)GNP
(iii)HDI
Chapter : “development” do the activity given on page no. 12 ,14 and 15.
Sanskrit
1 संधध िा भिनि ? उदाहरानानस
ु ारम लििि
2 घहििा माध्यमें समयं प्रदर्ायि |
3 एिां िथाम लििि
4 संख्यािाधचर्ाब्दान लििि (एि िः पंच पयंिम )
5 भिान दे हाल्याम िसनि, भ्रािरम प्रनि एिं िधाापनाम पत्रं लििि याि स: दर्मी िक्षायाम प्रथमस्थानं प्राप्ििान |
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