Kendriya Vidyalaya AFS Sec-14 Gurgaon

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1 Kendriya Vidyalaya AFS Sec-14 Gurgaon SUMMER BREAK HOLIDAYS HOMEWORK CLASS X Session HOLIDAY HOMEWORK FOR SUMMER VACATION CLASS X SUBJECT MATHEMATICS 1. By using division algorithm, find the largest number which when divides 969 and 2059, gives the remainders 9 and 11 respectively. 2. Show that any positive odd integer is of the form 6q + 1, 6q + 3 or 6q + 5, where q is some integer. 3. Check whether 6 n can end with the digit 0 for any natural number n or. 4. Prove that is an irrational number. 5. Represent the quadratic polynomial x 2 4x 5 on graph and find the zeroes of the polynomial. 6. If are zeroes of the quadratic polynomial f(x) = 3x2 5x 2, then evaluate 7. If two zeroes of the polynomial x 4 6x 3-26x x -35 are, then find other zeroes. 8. For what value of k, 3 is a zero of the polynomial 2x 2 + x + k? 9. Find the value of k, so that the following system of equations 3x y - 5 = 0, 6x 2y k = 0 has no solution. 10. The sum of digits of a two digit number is 15. The number obtained by reversing the order of digits of the given number exceeds the given number by 9. Find the number. 11. For what value(s) of k, does the pair of linear equations kx + y = k 2 and x + ky = 1 have i) no solution? ii)

2 infinitely many solutions? iii) a unique solution? 12. Anil is sitting on a boat which goes 30 km upstream and 44 km in downstream in 10 hours. In 13 hours, he can go 40 km upstream and 55 km downstream. i) Form the linear equations. ii) Determine the speed of the stream and that of the boat in still water. Social Science History- Write question & answers from 1-9 of ch.1 The Making of a Global World. Geo. Revise & fill up the map Major Soils of India. Learn 1 st Ch. Of Civics, Geo. & Eco. For class test. (The class test will be held on 25/06/2014.) Social Project- Collect material on Role of Women in Freedom Struggle. Exhibits- Collect material on Scientific & Technological development of Chhattisgarh & Afghanistan for Social Science Exhibition.

3 Important note: Information Technology(Vocational) Prepare PPT and submit in one CD. Prepare maximum 15 slides and minimum 10 slides. Prepare 5 hot questions with answers. For X A Class- Networking Devices For X B Class- Track Changes (with screenshots) For X C Class- Transmission Media For X D Class- Networking Topologies For X E Class- Switching Techniques For X F Class- Mail merge (with screenshots)

4 SCIENCE Name the term for transport of food from leaves to other parts of plants. 2. Which pancreatic enzyme is effective in digesting proteins? 3. After a vigorous exercise you may experience cramps in your leg muscles. Why does this happen? 4. Name the organelle in which photosynthesis occurs. 5. Name the type of blood vessels which carry blood from organs to the heart. 6. Write the two functions of kidneys. 7. Differentiate autotrophs and heterotrophs. 8.Differentiate between aerobic respiration and anaerobic respiratrion. 9. What is double circulation.? 10 Write any two points of difference between respiration in plants and respiration in animals. 11. Differentiate Holozoic nutrition and saprophytic nutrition. 12. Why do veins have thin walls compared to arteries? 13. Where do the plants get each of the raw materials? 14. Write one function each of the following components of transport system in human beings. a)arteries b) veins c)capillaries 15. What is the function of epiglottis in man? Draw a labeled diagram showing the human respiratory system 16. Name the tissue that transports the prepared food in plants. Explain the mechanism of transport of food in plants.

5 17.Describe the functioning of nephrons. 18.What are the differences between the transport of materials in xylem and phloem 19. Draw and label the sectional view of the human heart.. 1. Write the process of digestion. 2.Which chamber of human heart receives oxygenated blood? Explain how oxygenated blood from this chamber is sent to all parts of the body. 3.Draw the diagram of cross section of a leaf and label the following in it. A) Chloroplast b)guard cell c)lower epidermis d)upper epidermis Name the two stages in photosynthesis. b)how are the alveoli designed to maximize the exchange of gases. Suggest any two features. 4.a) Draw a diagram of human alimentary canal. b) label the following on the diagram Esophagus, liver gall bladder, duodenum c)name any 5 digestive enzymes and write their functions A solution of potassium chloride when mixed with silver nitrate solution, an insoluble white substance is formed. Write the chemical reaction involved and also mention the type of the chemical reaction? 2. Ferrous sulphate decomposes with the evolution of a gas having a characteristic odour of burningsulphur. Write the chemical reaction involved and identify the type of reaction. 3. Why do fire flies glow at night? 4. Grapes hanging on the plant do not ferment but after being plucked do ferment.why? 5. Which among the following are physical or chemical changes? (a) Evaporation of petrol (b) Burning of Liquefied Petroleum Gas (LPG)(c) Heating of an iron rod to red hot.(d) Curdling of milk(e) Sublimation of solid ammonium chloride 6. A substance X, which is an oxide of a group 2 element, is used intensively in the cement industry. This element 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 reactions involved. 7. Write a balanced chemical equation for each of the following reactions and also classify them. (a) Lead acetate is treated with dilute hydrochloric acid to form lead chloride and acetic acid (b) A piece of sodium metal is added to absolute ethanol to form sodium ethoxide and H2 (c) Iron (III) oxide on heating with carbon monoxide reacts to form solid iron and gives CO2 (d) Hydrogen sulphide gas reacts with oxygen gas to form solid sulphur and liquid water. 8. Why do we store silver chloride in dark coloured bottles? 10. What is the difference between the displacement and double displacement reactions? Write equations for these reactions.

6 ENGLISH Q 1 Revise for FA-1. Q 2-Read 1st volume of the novel and write the summary of each chapter. Q 3-Read English Newspaper, watch English news and current affairs programme regularly. कक ष दसव व षय -हह द क र य कल प - अऩन ऩ स तक लऱख (द ननक / स प त हहक क र य कऱ ऩ) अऩन आऩब त क र च अन र ऩ क रकस भ स हहत ययक व ध म लऱख उद द श य स हहत ययक अलभर च, म लऱक र न यमक अलभव यत तत और र न क शऱ क व क स ह त क र य कल प - य स ऩ दक ह त अऩन सम र ऩत र त य र कर स र त - द ननक ज गरण सम र ऩत र उद द श य - लश म सम र ऩत र क महयय द न और बच क सम र ऩत र ऩढ़न क लऱए प र ररत करन उनक स जन यमक शत तत क व क स करन क र य कल प -क ठस थ करन (आग म प रनतय चगत ह त क ई एक प र रक कव त य द कर ) उद द श य- स मरण शत तत क व क स करन क व य यमक र च क व क स करन क र य कल प एफ़ ए 1 ऩर ह त ऩ ठ य म क त य र कर त क रक आऩक ग र ड म स ध र ह सक क र य कल प स ध य य क आदत क व क स क लऱए अनतररतत अध ययन ह त र च अन र ऩ क ई एक ऩ स तक अ श य ऩढ़ ज स -आदशश व यत ततय (व क न द

7 ),प र म द ज क प रलसद ध कह ननय (म नसर र),ज त आऩक (लश ख ड़ ),ऩत रत रक ए -स मन स रभ,ब ऱ -भ रत आहद