The purpose of moderator in a nuclear reactor is

Absorb the neutrons

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Slow down the neutrons

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Provide protecting shield.

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Remove heat from the reactor

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Solution

The correct option is B
Slow down the neutrons

A neutron released by fission normally moves at almost the speed of light. Moving at this speed is chance of being captured by 92U²³⁵nucleus is small. So a moderator slows down the neutrons so that they can cause further fission.

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