11. Commercial nitric acid is coloured because it contains dissolved :
12. Choose the incorrect statement pertaining to organic compounds
13. The gas which emits from rice field is
14. Ethylene is a ________ molecule.
15. The next higher homologue of C6H14 is
16. The gas used for artificial fruit ripening of green fruit is –
17. The natural source of hydrocarbon is
18. By which organic compound all the oils are known ?
19. Which of the following elements is found in all organic compounds?
20. Ethanol containing 5% water is known as :
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