1. the atmosphere contains almost the oxygen

2. the hard water contains the bicarbonates and sulphates of

3. Most chemical reactions show

4. Petroleum is refined by the technique of

5. Vitamin D is Found in

6. the Major fraction in the CNG is

8. Fats perform the function of

9. Major compound present in natural gas is

10. the largest fresh water source of earth is

11. the important source of organic compounds is

12. Plants mainly composed of

13. dehydration of alcohols with sulphuric acid yields

14. the Number of essential amino acids are

15. pressure of system effects the equilibrium of

16. Methane gas is used in preparation of

17. Solvation is the process that makes

18. Deficiency of vitamin A causes

19. Pure water has the taste

20. The colour of potassium dichromate salt is

21. A solution having Ph of 7.5 mean that it is