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| Q. |
Which one among the following is used as a moderator in nuclear reactors? |
| A. | Ozone |
| B. | Heavy hydrogen |
| C. | Hydrogen peroxide |
| D. | Heavy water |
| Answer» D. Heavy water | |
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Explanation: A pressurized heavy-water reactor (PHWR) is a nuclear reactor, commonly using natural uranium as its fuel, that uses heavy water (deuterium oxide D2O) as its coolant and neutron moderator. |
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