www.InyaTrust.com SCIENCE MODEL QUESTION PAPER – 9 Time: 3 hrs Marks : 80 I. Four alternatives are provided for each question. Choose the most appropriate alternatives and write it in the space provided. 1x10=10 1. A diesel like fuel can be prepared by using seeds of these plants (a) Nutmeg ; pongemia (b) Pongemia and jatropha (c) Jatropha ; Tamarind (d) Peeple tree and Tamarind 2. By the combustion of this maximum carbon monoxide is produced – (a) Paper (b) Natural gas (c) Charcoal (d) Cigarette 3. If a non nucleated cells of Meristematic tissue are used for tissue culture, then (a) Growth rate will be high (b) growth rate will be average (c) growth rate will be very low (d) growth may not take place 4. While working in a factory it is better, if we plug our ears by cotton (a) To avoid entry of dust into our ears (b) To concentrate better on our work (c) To reduce the sound pollution (d) To avoid damage to eardrum and strain 5. An ore of radioactive elements is _____ (a) plitch blende (b) Zinc blende (c) Cinnabar (d) Galene 6. Molecules which are called Bucky balls _______ (a) C12 (b)C6 (c) C100 (d) C60 7. Semi conducting elements belonging to carbon family are ____ (a) Sn ; Pb (b) Si ; Ge (c) Si ; C (d) Pb, Ge 8. 8. The velocity of sound is maximum in this (a) Air (b) Water (c) glass (d) vacuum 9. A highly lusterous, good electrical conductor in its pure form at all temperatures is _______ (a) Silicon (b) Graphite (c) Iodine (d) Sulphur 10. The sugar which is called 'Ribose' (a) C3H6O3 (b) C6H12O6 (c) C5H10O5 (d) C12H22O11 11. Match the following: A 1. Hippo campus 2. Inflorescence 3. Tap root 4. Exocoetus 1x4=4 B (a) Black gram plant (b) Flying fish (c) Rearing fish for food (d) The fish that swims vertically (e) Reproduction part of a plant found in cluster II. Answer the following briefly: 12. How much quantity of solar energy reaches earth atmosphere every day? 13. What happens when steam is passed through sugar cave juice? 14. Name the animal whose principle is adopted in radars and sonar systems. 15. Why thyroxin is called personality hormone? 16. Sugar solution do not conducts electricity? Why 17. Name the God particular. 18. How rocket can function even is vacuum? 7x1=7 III. Answer the following briefly: 2x16=32 19. Industrial wastes should not be let into water bodies justify this statement 20. While preparing amorphous silicon why the products are finally washed with hydrofluoric acid? 21. How does lymph protect our body? 22 www.InyaTrust.com www.InyaTrust.com 22. What is simple harmonic motion? Give examples 23. Draw a neat diagram of petrol engine (power stoke) and label the parts 24. In a heat engine 800 KJ heat energy is converted into 480 KJ of work. Calculate the efficiency of the machine. 25. Calculate the amount of energy that can be harnessed by 1 gram of matter? 26. Write the structure of 'Fructose' molecule 27. Is it possible for two Astronauts to converse each other on the surface of moon? Give reason. 28. About 6 liters of oxygen gas is collected at 300K if for a particular use, the volume has to be reduced to half of its original volume, find the temperature to which the gas has to be cooled at constant pressure. 29. Glass is a super cooled liquid explain 30. Name the reducing agent used in the extraction of Iron from haematite ore. Explain its roll with the help of chemical equations. 31. What is germ plasma hybridization? Explain with an example 32. Pooja of shanthinikethan school wants to electroplate a copper spoon with silver. Draw a neat diagram of experimental arrangement and label the parts. 33. Name the premates of man. 34. What is the inter relation between orbital velocity and escape velocity of a rocket? If one of the velocity is 7-8km/s calculate the other. IV. Answer the following: 5x3=15 35. Locate 26Fe56 in the periodic table. Discuss its group, period, block, nature etc; OR Among the representative elements name the elements of highest and lowest Ionization energy and atomic size. 36. Draw a neat diagram of HIV virus and label the parts. 37. Draw a neat diagram of apparatus used for hydraulic washing of haematite ore to concentrate the same. 38. What is junction potential? 39. What is the role of DNA in the life of an organism? V. Answer the following: 4x3=12 40. Draw a neat diagram of vertical cross section of human brain and label the parts 41. (a) Write the structural formula of benzene and Hexyne (b) What is fractional distillation? Name any four petroleum fraction. 42. (a) Draw a neat diagram of AC - Dynamo and label the parts. (b) Write the differences between step up and step down transformer OR (a) Explain the term electromagnetic induction, on what factors it depends? (b) State Fleming’s right hand rule. 23 www.InyaTrust.com