B.C.M. Sen. Sec. School, Basant City, Pakhowal Road, Ludhiana Holidays Homework Std. X

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1 B.C.M. Sen. Sec. School, Basant City, Pakhowal Road, Ludhiana Holidays Homework Std. X ENGLISH Reading: BBC Module 1 Page 4 to 13 Writing: BBC Module 2 Article Writing:- Page 72 to 75 BBC Module 3 Letter Writing:- Page 114 to 117 BBC Module 4 Short Story:- Page 152 to 155 Grammar: BBC Module 6 Gap Filling:- Page 210 to 211 Editing (error):- Page 216 to 217 Editing (Omission):- Page 222 to 223 Sentence re-ordering:- Page 228 to 229 Note:- All the work should be done on BBC worksheets only. PUNJABI 1. ivawkrn pusqk iv`c id`qy smwsi Sbd,bhuArQk Sbd,Agyqr ipcyqr,muhwvry Aqy ivsrwm icmnh num idawn purvk pvho qy id`qy AiBAws num ikqwb au`pr hi h`l kro[ 2. pwt-pusqk iv`c id`qi au`fxw is`k imlkw ismg qy fw. eyy.pi.jy. Abdu`l klwm di jivni num idawn purvk pvho qy qusin ies iv`con ki is`ikaw lei smkyp iv`c ilko[ 3. ACTIVITY:- muhwviraw qy ADwirq khwxi ilko[ 1. क ई 5 औपच र क व 5 अन पच र क पत र ल ख HINDI 2. ववज ञ पन खन :- ककन ह प च उत प दन प ववज ञ पन त य क 3. प ठ-न बतख न म इब दत,प ठ-स त त र ल क ष क वव ध क तक क ख डन क पढ

2 MATHEMATICS Q1. Find a quadratic polynomial each with the given numbers as sum and product of its zeros respectively. 7, 2 Q2. Express each number as a product of its prime factors: 525 Q3. Find out whether the lines: 20x 10y + 10 = 0, 2x y + 9 = 0, intersect at a point, are parallel or coincident. Q4. Half the perimeter of a rectangular garden, whose length is 4 m more than its width, is 36m. Find the dimension of the garden. Q5. Without actually performing the long division, state whether the following rational numbers will have a terminating decimal expansion or a non-terminating repeating decimal expansion, also 17 write down the decimal expansion : 525 Q6. Find HCF and LCM of 16, 12, and 180, using prime factorization method. Q7. Use Euclid s division lemma to show that the square of any positive integer is either of the form 3m or 3m + 1 for some integer m. Q8. Find the zeros of the quadratic polynomial x 2 + 9x + 20 and verify the relationship between the zeroes and the coefficients. Q9. Check graphically whether the pair of equations a. x + 3y = 6 b. 2x 3y = 12, is consistent. If so solve them graphically. Q10. Prove that 11 is irrational. Q11. Divide p(x) = x 4-5x+6 by g(x) = 2-x 2 Q12. Find all the zeroes of 2x 4 3x 3-3x 2 + 6x 2, if you know that two of its zeros are 2 and 2. Q13. The sum of the digits of a two digit number is 9. Also nine times this number is twice the number obtained by reserving the order of the digits. Find the number. Q14. Solve the following : 7x 2y xy = 5 and 8x+7y xy Q15. The ratio of incomes of two persons in 9:7 and the ratio of their expenditures is 4:3. If each of them manages to save 2000 per month, find their monthly incomes. Why should we save money? What value it reflects? Q16. Check whether 14 n can end with the digit zero for any natural number n. Q17. Explain why 17 X 18 X and 9 X 8 X 7 X 6 X5 X 4 X3 + 7 are composite numbers. Q students of Class X took part in mathematics quiz. If the number of girls is 4 more than the number of boys, find the numbers of boys and girls who took part in the quiz graphically. Q19. The larger of two supplementary angles exceed the smaller by 25 o. Find them. Q20. Five years hence the age of Jacob will be 3 times that of his son. Five years ago, Jacob s age was 7 times that of his son. What are their present ages? Q21. The difference of two numbers is 66. If one of the numbers is 4 times the other, find the numbers. = 15

3 CHEMISTRY Q-1. Why should Mg ribbon be cleaned before burning in air? Q-2. Solution of substances X is used for white washing: 1. Name the substance X and write its formula. 2. Write the reaction of X with water. Q-3. Why does the colour of copper sulphate solution change when an iron nail is dipped in it. Q-4. Identify the substances which are oxidized and reduced in the following reaction. 1. 4Na (s) + O 2 (g) 2Na 2 O (s) 2. CuO + H 2 (g) Cu (s) + H 2 O (l) Q-5. What do you observe when lead nitrate is heated in test tube? Write chemical reaction also. Q-6. Why sulphuric acid is added to water during its electrolysis. Q-7. What are antioxidants? Q-8. Translate the following statement into Balanced Chemical Equation? 1. NITROGEN GAS combines with OXYGEN GAS to form NITROGEN DIOXIIDE GAS. 2. A pinch of solid sodium carbonate is added to dilute hydrochloric acid in a test tube. Sodium chloride and water formed remain in solution and carbon dioxide escaped out. 3. Hydrogen sulphide gas reacts with oxygen gas to form solid sulphur and liquid water. Q-9. Can a double displacement reaction takes place when product are highly soluble or highly ionized? Q-10. Crystals of copper sulphate are heated in a test tube. 1. What is the colour of crystals: - 1. Before heating 2. After heating 2. What is the source of liquid droplet seen on the inner upper side of the test tube during heating process? Q-11. Justify with the help of example that displacement reaction is also a redox reaction. Q-12. A student placed a china dish containing 2 gm of silver chloride in the sunlight for sometime. 1. What is the colour change of that solid? Q-14. Grapes hanging on the plant do not ferment but after being plucked from the plant can be fermented write equation also. Q-15. A substance X which is an oxide of a group 2 element is used intensively in the cement industry. It is present in bones also. On treatment with water it forms a solution which turns red litmus blue. Identify X and also write the chemical reaction involved. Q-16. Why do we store silver chloride in dark coloured bottles? Q-17. A magnesium ribbon is burnt in oxygen to give a white compound x accompanied by the emission of light. If the burning ribbon is now placed in a atmosphere of nitrogen it continues to burn and form a compound Y a) Write the chemical formulae of x and y. b) Write a balanced chemical equation, when X is dissolved in water. Q-18. On heating blue coloured powder of copper nitrate, copper oxide (black), and a gas X is formed a) Identify the brown gas X. b) Write the balanced chemical equation of the reaction..

4 PHYSICS Chapter 12 (ELECTRICITY) 1. What happens when an ammeter is placed in parallel with a circuit element? 2. Derive an expression for the combination of three resistances connected in parallel? 3. How can we classify solids on the basis of their resistivity values? 4. A 4ohm resistance wire is doubled on it. Calculate the new resistance of the wire.. 5. What is the need of using combination of resistances in electrical circuits? 6. Describe practical applications of heating effect of electric current? 7. Define kilowatt-hour. How many joules are equal to 1 kilowatt-hour? 8. An electric heater is used on a 220V supply and takes a current of 5A. What is its power? What is the cost of using the heater for 5 hours if 1kwh costs 1.50? 9. Two lamps, are rated 60 W at 220 V and other 40 W at 220 V, are connected in parallel to electric supply at 220 V. 10. What length of a copper wire of cross-sectional area 0.01mm 2 would be required to obtain a resistance of 1 k-ohm? Resistivity of copper= 17*10-8 ohm-m. BIOLOGY 1. What is blood pressure? Which instrument is used to measure the blood pressure? 2. Describe the functioning of artificial kidney. 3. Structure of small intestine is suited to its function. Justify. 4. Give a schematic representation of transport and exchange of oxygen and carbon-dioxide in humans. 5. How do guard cells regulate the opening and closing of stomata? 6. What is likely to happen if green plants disappear from earth? 7. Why is nutrition a necessity for an organism? Give three reasons. 8. All plants give out oxygen during day and carbon dioxide during night. Justify. 9. Stomata of desert plants remain closed at day time. How do they take up carbon-dioxide and perform photosynthesis? 10. Why the medium in mouth become acidic? What is he ill effect of acidic medium? How this can be prevented? 11. What is the advantage of having four chambered heart? 12. Mention the components of transport system in highly organized plants? State the function of these components? 13. Which is the internal energy reserve in plants? Do the animals have same energy reserve? 14. What are the end products of digestion? 15. How is the unused energy stored in plants? 16. Name the respiratory pigment present in our body. Where is it present? 17. What are the end products formed during the process of fermentation in yeast? Under what conditions a similar process takes place in our body that leads to muscle cramps? 18. Draw a diagram of human respiratory system and label the following: (a) Part through which air is taken in (b) Part which protects the lungs (c) Part which carries air into lungs 19. What function is served by:- (a) Gastric sphincter (b) Anal sphincter 20. The breathing cycle is rhythmic, whereas exchange of gases is a continuous process. Justify this statement.

5 SOCIAL SCIENCE 1. How did the dependency on potatoes kill the poorest peasants of Ireland? 2. What enhanced Europe s wealth for trade in Asia? 3. What is El-Dorado? 4. Why did thousands of Europeans flee to America? 5. What was global Agricultural economy? 6. Which important inventions transformed 19 th century world? 7. What was paper partition? 8. How did loss of cattle make labour market strange? 9. Nineteenth century indenture has been described as a new system of slavery. Why? 10. Which method did Henry Ford use to increase car production? 11. Why did the inflow of fine cotton begin to decline? 12. What is the full form of NIEO? 13. What was Rinderpest? 14. What were home charges? 15. How did British manage Opium trade with China? 16. Why was the First World War called the First Industrial War? 17. Why was Britain burdened with huge external debts after World War I? 18. What was the first and foremost reason for the economic crisis? 19. What was the impact of economic crisis on US banks? 20. How were the jute producers of Bengal affected by economic crisis? 21. Who was indentured labourer? 22. What were Corn Laws? 23. Why did perishable goods become a luxury beyond the reach of European poor? 24. What was the Great Depression? 25. What was the estimated loss of World War II? 26. What was G 77? 27. What led to the collapse of the system of fixed exchange rates? 28. What were canal colonies? 29. What was the main aim of post war international economic system? 30. What do you mean by Hosay?