10. Non ionic group of detergent molecule is A. Sulphate group B. Nitrate group C. Chloride group D. Hydrocarbon group II. Match the following 11)C2 H2 12)C3 H6 13)C4 H6 14)C6 H6
10x1=10
Benzene Propyne Acetylene Butane Butyne Propene 1x4=4
III. Fill in the blanks: 15.The technique is to be used by Annirudha to detect the fault in the engine parts of his car is --------------16. The first sounding rocket designed completely in India is -------------17. During beta decay of C 14 6 the mass of newly formed nucleus is ……….. 18. Solar cooker box is painted with black colour because ……… 1x4=4 IV. Answer the following in one sentence each:: 19. Why is diode used as a rectifier? 20. What is centrifuge? 21. State the Doppler Effect. 22. What is the role of coolant in nuclear reactor? 23. How does the use of biodegradable waste like cow dung decrease the energy crisis? 24. Write the example equation of manufacture of soaps 1x6=6 V. Answer the following: 25.State the Dynamo Rule. 26. Draw a neat diagram showing Faraday’s experiment. 27. Why is laser light coherent? 28. Draw the diagram of reverse bias of p-n junction. 29. Draw a neat diagram of single stage rocket and label its parts. 30. What are radio-isotopes? Give two examples 31. State the uses of invar steel and nichrome. 32. Mention the role of magnesium powder in the extraction of silicon by quartz 33. What is permutit ? Name the chemical used to regenerate it. 2x9=18 VI. Answer the following: 34. Give scientific reasons for the following: a. Astronaut orbiting in a space craft experiences weightlessness. b. The value of acceleration due to gravity (g) varies on the earth. c. Gravitational law is called universal gravitation law. 2