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1. The important metal used with iron to produce stainless steel is _____ .

2. Which gas is responsible for the swelling of bread?

3. The metal constituent of chlorophyll is _____ .

4. Which acid is used for etching glass?

5. Paraffin wax is _________ .

6. Solder is an alloy of _____ .

7. Alum is used as

8. Nuclear fuel in the sun is ______ .

9. Dead organisms are transformed into petroleum and natural gas ______ .

10. Organic Compounds are only soluble in _____ .

11. Which acid is used in soft drinks?

12. Which acid is present in Bee Sting?

13. Tooth enamel is made up of ______ .

14. The name ‘catalyst’ was given by _____ .

15. A polymeric substance used to make parachute is _____ .

16. What is used to avoid melting of ice?

17. Carbon occur in the nature in the purest form as?

18. Oxidation is defined as -----

19. In nuclear reactor, chain reaction is controlled by using _____ .

20. The radioactive element most commonly detected in humans is _____ .

21. Hydrogen bomb is based on the principle of _____ .

22. The ultrapure metal is obtained by _____ .

23. Most abundant metal in earth’s crust is ______ .

24. Balloons are filled with _____ .

25. The element common to all acids is _____ .

Kerala PSC - Important and Repeated General Science Questions - 12 Reviewed by Santhosh Nair on 7:43 PM Rating: 5