GENIUS TUITION CENTRE- SPECIAL QUESTION PAPER 2016 Class: X th STD Subject: SCIENCE Marks: 75 Time: 2:30 hrs. SECTION - A (15 x 1 = 15)
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1 GENIUS TUITION CENTRE- SPECIAL QUESTION PAPER 2016 Class: X th STD Subject: SCIENCE Marks: 75 Time: 2:30 hrs. (i) SECTION - A (15 x 1 = 15) Answer all the questions. (ii) Choose and write the correct answer. 1. Primitive man evolved in (Africa, America, Australia, India) 2. The first vaccine injected into a just born baby is (Oral polio, DPT, DPT and Oral polio, BCG ) 3. An endocrine gland which is both exocrine and endocrine is the (Pancreas, pituitary, thyroid, adrenal) 4. Which of the following is correctly matched? (False fruit mango, Multiple fruit apple, Aggregate fruit polyalthia, Caryopsis banana) 5. Mitral valve is found between (Right auricle and right ventricle, Left auricle and left ventricle, Right ventricle and pulmonary artery, Left ventricle and aorta) 6. The product obtained in the anaerobic respiration of yeast is (Lactic acid, Pyruvic acid, Ethanol, Acetic acid) 7. is used in seeding clouds. (Potassium iodide, calcium carbonate, sulphurdioxide, ammonium phosphate) 8. Which is a non-renewable resource? (Coal, petroleum, natural gas, all the above) 9. The mixture of gases used by deep-sea divers is (helium-oxygen, oxygen- nitrogen) 10. A reddish brown coloured element X on heating in air, becomes a black coloured compound Y. X and Y are and (Cu, Cuo / Pb, Pbo) 11. Gold does not occur in the combined from. It does not react with air or water. It is in the state. (native / combined) 12. Buckminster fullerene is the allotropic from of (Nitrogen / Carbon / Sulphur) 13. The mass of an object is 5 kg. what is its weight on the earth (49 N, 0.49 N, 4.9 N, N) 14. The atomic number of natural radioactive element (greater than 82, less than 82, not defined, atleast 92)
2 15. The field of view is maximum for (plane mirror, concave mirror, convex mirror) SECTION B (20 x 2 = 40) (i) Answer any twenty questions. 16. Sequentially arrange the different species of man from primitive to modern man. (Neanderthal man, Homo habilis, Homo erectus, Homo sapiens) 17. What are monoclonal antibodies? Mention its use. 18. Find the unmatched fairs. Nif genes Nitrogen Fixation tt Alleles Bio chips Biological computer manufacturing Interferon Antiproteins of Bacteria Stem cells Unspecialized mass of cells 19. Name the tests done for the diagnosis and confirmation of AIDS. 20. Copy the diagram and label the parts with the help of the clues given. (i) It is otherwise called supra renal gland. (ii) It secretes two hormones namely aldosterone and cortisone. 21. Use words from the given list to complete the following paragraph. (The words may be used once / more than once / not at all) Raja went to the field along with his father. He showed mustard seeds in the soil. After a few days he observed the process of. The seeds grew into plants and produced. On maturity, these flowers produced pollen grains that were transferred to the stigma by. The male gametes fused with the female gametes during the process of. 22. Which blood cells are without nuclei? What is the advantage of this condition? 23. Mention the various valves and their location in the human heart? 24. (a) Primary excretory organ : (b) River of life : 25. What is photosynthesis? Write a balanced equation for this bio-
3 chemical reaction? 26. Describe the change that occurs in a touch-me-not plant when it is touched? 27. Match the methods of nutrition of special organs with suitable examples? Autotrophs Mycorrhiza Cuscutta Parasites Chlorophyll Monotropa Saprophytes Haustoria Hibicus 28. Fill in the blanks. (a) Animals give out through respiration. (b) In the presence of sunlight, plants prepare 29. A non-renewable resource is a natural resource, if it is replaced by natural process at a rate equal to or faster than its rate of consumption by humans. Read this statement and say whether it is correct or incorrect. If it is incorrect, give the correct statement. 30. What are diseases that have a greater risk of spread in high population density places like bus stand or school? 31. Find the odd one out. (i) bio-alcohol, green diesel, bio-ethers, petroleum. (ii) cholera, typhoid, scabies, dysentry. 32. Porkodi prepared a solution which could be separated by filtration. a. Name the type of solution. b. Is the solution transparent or opaque? c. Mention the nature of the solution. 33. Find the concentration of solution in terms of weight percent if 20 gm of common salt is dissolved in 50 g of water? 34. Calculate the number of water molecules present in one drop of water which weigh 0.18 g. 35. Identify the wrong statements and correct them. (a) Sodium benzoate is used in food preservative. (b) Nitric acid is not used as fertilizer in agriculture. (c) The p H of acid is greater than Why does the colour of copper sulphate change when an iron nail is kept in it? Justify your answer. 37. Assertion: A greenish layer appears on copper vessels, if left uncleaned.
4 Reason: It is the due the formation of layer of basic copper carbonate. Give the correct option: a) Assertion and reason are correct and relevant to each other. b) Assertion is true but reason is not relevant to the assertion. 38. The design the body of an aircraft, aluminium alloys are used. Give reasons. 39. Write down the possible isomers and give their IUPAC names using the formula C 4 H Kanishka is standing in a dinning line 6.38 x 10 3 km from the centre of the earth. The mass of the earth is 6 x kg. (i) Find the acceleration due to gravity. (ii) Will the value change after she finishes her lunch? 41. Correct the mistakes, if any, in the following statements. (a) A good source of energy would be one which would do a small amount of work per unit volume of mass. (b) Any source of energy we use to do work is consumed and can be used again. 42. What is bio-mass? What can be done to obtain bio-energy using biomass? 43. The figure is a part of closed circuit. Find the currents i 1, i 2 and i Complete the table choosing the right terms from within the brackets. (Zinc, copper, carbon, lead oxide, aluminium) +ve electrode Daniel cell -ve electrode Leclanche cell 45. Does magnetic monopole exists? Give reasons. 46. How can you identify the three types of mirrors without touching them? Give reasons. 47. Light enters from air to kerosene having refractive index of What is the speed of light in kerosene, if the speed of light in air is 3 x 10 8 m/s?
5 SECTION C (4 x 5 = 20) (i) Answer any four questions by choosing one question from each part. (ii) Each question carries five marks. (iii) Draw diagram wherever necessary. PART I 48. What is immunity? Write a note on the various types of immunity. 49. Name the endocrine glands and their location in the human body. Describe any two of them in detail. PART II 50. Describe the structure of a dicot seed. 51. In your locality people are affected due to water scarcity. What measures will you take to deal with the problem of water scarcity? PART III 52. Sodium bicarbonate breaks down on heating. 2NaHCO 3 Na 2 Co 3 + H 2 O + CO 2 (Atomic mass of Na = 23, C = 12, H = 1, O = 16) a. How many moles of sodium bicarbonate are there in the equation? b. What is the mass of sodium bicarbonate? c. How many moles of carbon dioxide are there in the equation? 53. Organic compound A of molecular formula C 2 H 6 O liberates hydrogen gas with sodium metal. A gives B of formula C 4 H 10 O, when it reacts with concentrated H 2 SO 4 at 410K. At 440K with concentrated H 2 SO 4 A gives compound C of formula C 2 H 4. This compound C decolourises bromine water. What are A, B and C? PART IV 54. State Newton s law of gravitation. Write an expression for acceleration due to gravity on the surface of the earth. If the ratio of acceleration due to gravity of two heavenly bodies is 1 : 4 and the ratio of their radii is 1 : 3, what will be the ratio of their masses?
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