A) moderating speed of neutrons
B) cooling
C) both (a) and (b)
D) for transporting heat
Correct Answer: A
Solution :
Heavy water\[({{D}_{2}}O)\]is used in nuclear reactors to decrease the speed of neutrons. Heavy water is oxide of heavy hydrogen (deuterium, \[{}_{1}{{H}^{2}}\]) and is obtained by multi step electrolysis of water.
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