The chiefsource for the production of nitrogeneous fertilizers is :
1). Ammonia
2). Nitric acid
3). Nitrogen
4). Nitrogen dioxide
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1. The polymer used in making plastic crockery is
3. Question 14.3:Carbon monoxide gas is more dangerous than carbon dioxide gas. Why?
4. Which of the following is not an addition polymer?
5. Which of the following is used for refrigeration?
6. Two elements which can form a large number of compounds are
7. Isobars are lines displaying areas of equal -
8. Which of the following is used as filler in tyre of rubber ?
9. Which one of the following contributes largely to the greenhouse effect ?
10. Removal of carbon particles from air involves the principle of