The metal chiefly used for galvanising iron is
1). Zinc
2). Mercury
3). Cadmium
4). Tin
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1. Photo oxidation process is initiated by
2. The maximum number of covalent formed by nitrogen is
4. ___________ allows searching for information and computing derived information.
5. Fementation of ethyl alcohol into acetic acid is done by-
6. What is the principal ore of aluminium ?
7. Which method will be employed to test the hardness of water?
8. Which of the following in automobile exhaust can cause cancer