www.InyaTrust.com SCIENCE MODEL QUESTION PAPER – 10 Time: 3 hrs Marks : 80 I. Four alternatives are provided for each question. Choose the most appropriate alternative. 1x10=10 1. Identify from the following, a conventional source of energy. a) solar energy b) tidal energy c) natural gas d) bioenergy 2. Hydrocarbons are the com-pounds of a) C,H,O b) C,H c) H, Co2 d) Co2, H2O 3. Gas released during waste incineration is a) Sulphur dioxide b) Nitrogen dioxide c) Carbon dioxide d) Carbon monoxide 4. The nuclear' fission chain reaction is initiated by which particle? a) Proton b) Electron c) Neutron d) Positron 5. Conducting element in phloem is a) sieve tube b) phloem fibres c) phloem parenchyma d) companion cell 6. The General formula of Alkynes is a) CnH2n-2 b) CnH2n+2 c) CnH2n d) CnH2n+5 7. Echo of sound is due to ______ of sound. a) propagation b) speed c) refraction d) reflection 8. Tissue that binds muscles to bone is a) Ligaments b) Tendons c) Voluntary muscles d) Involuntary muscles 9. The gas liberated when metal react with dilute Hydrochloric acid is a)Nitrogen b) Oxygen c) Hydrogen d) All the above 10. Ratio of plants obtained by monohybrid cross. a) 9 : 3 : 3 : 1 b) 3 : 3 : 3 : 1 c) 3 : 1 d) 6 : 3 11. Match the following A B 1. Ulothrix a) Produce seeds 2. Cycopodium b) Sporophyte is a prothallus 3. Pinus c) Contain xanthophyll in excess 4. Bean d) Seeds are not enclosed in fruits e) Thalloid Structure f) Gametophyte is prothallus 4x1=4 C i. Has parallel veins ii. Adult plant is a sporophyte iii. Micro spores contain male gametes iv. Adult plant is a gametophyte v. Has reticulate veins vi. Rhizoids are absent II. Answer the following questions : 12. Name the principle used in the construction of solar cell. 13. Why do frog hibernate? 14. What are Molasses? 15. What are pulsars? 16. Which is the natural polymer formed by many units of monosaccharides? 17. Mention the functions of feathers. 18. Write the formula used to Calculate electro chemical equivalent. 7x1=7 III. Answer the following questions: 16x2=32 19. a) What is orbital velocity? b) What is the relationship between orbital velocity and escape velocity? 20. How is Amorphous silicon obtained? 21. Give any two applications of doppler effect. 22. What is Hydroponics? How is it advantageous? 23. List out any four characteristics of vertibrates. 24. Why does a piece of cotton get charred when immersed concentrated sulphuric acid? 24 www.InyaTrust.com www.InyaTrust.com 25. What is the function of the following in nuclear reactor? 26. Name the pigment that gives red colour to blood. Mention its function. 27. State and explain Boyle's law. 28. Birds are decreasing in thickly populated areas. Give reason. 29. What are the functions of the following in a petrol engine i) Carburetter ii) Spark plug 30. Distinguish between transverse waves and longitudinal waves. 31. What are Heat engines? How are they classified? 32. What mass of copper is deposited at the cathode in the copper voltameter by passage of 2 amperes of current for 30 minutes. 33. Give scientific reasons. i. It is easy to tear the wet paper than dry paper. ii. Ceramic is an essential part of electrical gadgetry. 34. Lime stone is used in the extraction of iron from its ore. Give reason. IV. Answer the following questions. 35. Draw a neat diagram of Hydraulic washing and label its parts. 36. a) How is PnP transistor prepared. b) Draw a neat circuit symbol : i) nPn transistor ii) Diode 37. Draw a neat diagram of HIV Virus. Lable all the parts. 38. Write any three advantages of modern periodic table. 39. What is Genetic engineering? How is it advantageous? 5x3=15 V. Answer the following questions. 3x4=12 40. Draw a neat diagram of vertical section of Human brain and label the following parts. a) Cerebellum b) Medula oblangata 41. a. Write any three characteristics of Isomers of a compound. b. Alicyclic hydrocarbons are consid-ered as saturated hydro carbons why? OR a. What are polyfunctional compounds? Give any two examples. b. Unsaturated oils have very little shelf life. Why? 42. a. Electricity is produced when a bar magnet is thrust into the conducting it. What steps do you take to increase the electric current in the coil? b. Give any two devices which use an electric motor. OR a. What is mutual induction? b. The magnitude of the emf induced in the secondary coil of a transformer depends. 25 www.InyaTrust.com