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प्रश्न
What is the contribution of chemistry in the following field?
National Defence
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उत्तर
Contribution of chemistry in the field of national Defence:
Substances like gunpowder, T.N.T. (trinitrotoluene), phosgene, chemical weapons, laughing gas, etc., are all products of chemistry which contribute to the national defence.
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संबंधित प्रश्न
Match the following words in column A with those in column B:
| Column A | Column B | ||
| (a) | Clothing | (i) | toothpaste, cosmetics |
| (b) | Green Revolution | (ii) | nylon, wool |
| (c) | Building Material | (iii) | agriculture |
| (d) | Commodities of daily | (iv) | mortar, cement |
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