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| Q. |
Heavy water is – |
| A. | Deuterium |
| B. | Rain water |
| C. | Tritium oxide |
| D. | Deuterium oxide |
| Answer» D. Deuterium oxide | |
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Explanation: Heavy water is deuterium oxide (2H2O). It is a form of water that contains a larger than normal amount of the hydrogen isotope deuterium (2H or D, also known as heavy hydrogen), rather than the common hydrogen-1 isotope (1H or H, also called protium) that makes up most of the hydrogen in normal water. |
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