Kendriya Vidyalaya No1,AFS,Jamnagar HOLIDAY HOMEWORK

Class-X

दसवी का गृहकार्य�

1 नि�बंध लेख�

(i) प्राकृनि�क आपदा- भूकम्प

प्राकृनि�क आपदाए भूकम्प से �ुकसा� बचाव के उपार्य

(ii) ओलम्पिम्पक और भार�

ओलम्पिम्पक खेल भार�ीर्य खिखलानि%र्यो का प्रदर्श�� सुधार के कदम

2 पत्र लेख�

(i) निवद्यालर्य में एक कनिव सम्मेल� कर�े की अ�ुमनि� ले�े हे�ु प्रधा�ाचार्य� से अ�ुरोध कीजि0ए।

(ii) साम्प्रदायिर्यक�ा और 0ानि�वाद के निवरोध में 0�-0ागृनि� पैदा कर�े के लिलए समाचार-पत्र के प्रधा� सम्पादक को पत्र लिलखिखए।

(iii) हाल में देखी हुई निकसी नि8ल्म (सुल्�ा�, दबंग, मैरीकोम) की समी कर�े हुए यिमत्र को पत्र लिलखिखए।

Maths

Q1 Find the LCM & HCF of 144 and 90.Q2 Find the largest number that divides 2053 and 967 ,and leaves a remainder of 5 and 7 respectively.Q3 Without performing the long division state 15/1600 will have a terminating

decimal expansion or non-terminating repeating decimal expansion.Q4 If sum of the zeros of the polynomial p(x)=2 x3−3 kx2+4 x−5 is 6,then find value of k.Q5 Using Euclid’s division algorithm, find HCF of 81 and 237.Q6 Express 234 number as a product of its prime factor.Q7 Find a quadratic polynomial using (4, 1) as the sum and product of its zeros respectively.Q8 Write down the decimal expansion of 3/8 without actually performing the long division. Q9 Find the zeros of the polynomial x2−2 x−8and verify the relation between zeros and coefficients.Q10 Prove that 3√2 is irrational.Q11 Show that any positive integer is of the form 3q,3q+1 or 3q+2 where q is some integer.Q12 If the zeros of the quadratic polynomial x2+ (a+1 ) x+bare 2 and -3, then find a and b.Q13 Use Euclid’s division lemma to show that square of any positive integer is either

of the form 3m or 3m+1 for some integer m.Q14 Obtain all zeros of x4−6 x3−26 x2+138 x−35,if two of its zeros are 2+√3 and 2 -√3.Q15 Divide 3 x2−x3−3 x2−3x+5 by x-1-x2 and verify the divisional algorithm.Q16 (i) Given that HCF(306,657)=9 find LCM(306,657).

(ii) Explain why7×11×13+13 and 7×6×5×4×3×2×1+5 are composite numbers.Q17 The length, breadth and height of a room are 8m25cm ,6m 75cm and 4m50cm

respectively. Determine the longest road which can measure the three dimension of the room exactly. Q18 Find HCF of 96 and 404 by prime factorisation and find their LCM.Q19 The HCF of two number is 16 and their product is 3072.Find their LCM.Q20 The HCF of two numbers is 145 and their LCM is 2175.If one number is 725 ,find the other. Q21 Prove that 3+2√5 is irrational.Q22 Prove that √5+√ 3 is irrational.Q24 Prove that 4+√ 2 is irrational.Q25 Verify that ½ ,1,-2 are zeros of cubic polynomial p(x)=2x3+ x2−5x+2

and,verify the relationship between zeros and the coefficient.Q26 Use Euclid’s division lemma to show that cube of any positive integer is either of

the form 9m ,9m+1 or 9m+8 for some integer m.Q27 Obtain all zeros of polynomial f(x)= x4−3x3−x2+9 x−6,if two of its zeros are

−√3∧√3.Q28 Divide the polynomial p(x)=x3−6 x2+11 x−6 by g(x)= x2+ x+1 .Find the

quotient and remainder.

Q29 Divide the polynomial p(x)=15 x3−20 x2+13 x−12 by g(x)= x2−2 x+2 .Find the quotient and remainderQ30 Check weather the the first polynomial is a factor of second polynomial by

applying the divisional algorithem,f(X)=66 x5−x4+4 x3−5 x2−x−15,g(X)=2 x2−x+3. AND

SOLVE ALL QUESTIONS OF MONTHLY TEST PAPER

SCIENCE

1. Translate the following statements into chemical equations and then balance them. a) Hydrogen gas combines with nitrogen to form ammonia.b) Barium chloride reacts with aluminium sulphate to give aluminium chloride and a

precipitate of barium sulphate.c) Potassium metal reacts with water to give potassium hydroxide and hydrogen gas.d) Hydrogen sulphide gas burns in air to give water and sulphur dioxide.e) Sodium hydroxide solution ( in water) reacts with hydrochloric acid solution (in

water) to produce sodium chloride solution and water2. What do you mean by an exothermic reaction? Give examples. 3. Explain the following.

a) We apply paint on iron articles.b) Oil and fat containing food items are flushed with nitrogen.

4. What do you mean by a precipitation reaction? Explain by giving an example. 5. A solution of a substance X is used for white washing. a) Name the substabce X and write its formula.

b) Write the reaction of the substance X with water.6. Why does the colour of copper sulphate solution changes when an iron nail is dipped in it? 7. In the refining of silver, the recovery of silver from silver nitrate solution involves displacement by copper metal. Write down the reaction involved. 8. Balance the following chemical equations.

a) HNO3 + Ca(OH)2 Ca(NO3)2 + H2Ob) NaOH + H2SO4 Na2SO4 + H2Oc) Fe2O3 +Al Al2O3 +Fe d) NaCl + AgNO3 AgCl + NaNO3 e) Mg + HCl MgCl2 + HClf) Zn + AgNO3 Zn(NO3)2 + Ag

9. Identify the substances that are oxidized and the substances that are reduced in the following reactions. a) ZnO + C Zn + CO

b) MnO2 + 4HCl MnCl2 + 2H2O + Cl2

c) CuO + H2 Cu + H2O10. Write one equation each for decomposition reactions where energy is supplied in the form of heat, light or electricity. 11. Why are decomposition reactions called the opposite of combination reactions? Explain with the help of an example. 12. Differentiate between autotrophs and heterotrophs.13. What provides energy to the green plants? How is nitrogen taken up by plants?14. Write three functions of lymph.15. What is meant by a displacement reaction? Give two examples to explain.16 . What are the functions of blood? (any three)17. Draw a well labeled diagram showing excretory system in human beings.18. What are the differences between aerobic and anaerobic respiration? Name some organisms that use anaerobic mode of respiration.19. Describe the double circulation in human beings. Why is it necessary?20. Compare the functioning of alveoli in the lungs and nepherons in the kidneys with respect to their structure and functioning.21. Differentiate between ateries and veins.22. What are the components of transport system in highly organized plants?23. What are the components of the transport system in human beings? Write the functions of these components.24. Why is it necessary to separate oxygenated and deoxygenated blood in mammals and birds?25. What are the different ways in which glucose is oxidized to provide energy in various organisms?

Social science

1. Write all the new word from the chapter work life & leisure.

2. Read the chapter the age of industrialization and write the short summary of it.

3. Imagine that you are a newspaper reporter writing a piece on the changes you see in London in 1811.what problems are you likely to write about? Who would have gained from the changes?

4. City development cannot take place without destroying communities and lifestyles. This is a necessary part of development? Give your views.

5. Explain the mystery of London fog in 1847 and 1952.

6. Why a number of Bombay films were about the lives of migrants & what led to the major expansion of Bombay’s population in the mid nineteenth century.

7. Draw the classification of resources.

8. Locate the major soil types of India on a physical map of India.

9. Locate the of major rivers and Dams on a physical map of India.

10. Locate an outline map of India iron ore fields &

Industries