Question

Q16. Which of the following is used as moderator in nuclear reactors? *

(a) Heavy hydrogen

(b) ozone

(c) Heavy water

(d) hydrogen peroxide

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Answer 1

Answer:

ANSWER

A moderator is a material used in a nuclear reactor to slow down the neutrons produced from fission. By slowing the neutrons down the probability of a neutron interacting with Uranium-235 nuclei is greatly increased thereby maintaining the chain reaction.

Heavy water (D

2

O) is used as a moderator in nuclear reactor. It containing significantly more than the natural proportions (one in 6,500) of heavy hydrogen (deuterium, D) atoms to ordinary hydrogen atoms. Heavy water is used as a moderator in some reactors because it slows down neutrons effectively and also has a low probability of absorption of neutrons.

Answer 2

Answer:

Heavy water is used as a moderator in some reactors because it slows down neutrons effectively and also has a low probability of absorption of neutrons

Explanation:

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