The proportion of nitrogen in dry air is
| A. | 21% by volume |
| B. | 78% by volume |
| C. | 50% by weight |
| D. | 21% by weight |
Answer : B Explanation : |
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Option: A Explanation : Explanation will come here. Explanation will come here. Explanation will come here. Explanation will come here. Explanation will come here. |
