- (a) Uranium
- (b) Lead
- (c) Heavy water
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_______ is considered the largest glacier of Pakistan.
March 18, 2026
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- (A) Siachen Glacier
- (B) Tirich Mir Glacier
- (C) Biafo Glacier
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Which substance is used as moderator in atomic reactors?
Which substance is used as moderator in atomic reactors?
A moderator's function in an atomic reactor is to slow down the fast-moving neutrons to keep the chain reaction going. Heavy water, or D2O, is a good moderator because it slows down the neutrons well without absorbing too many.
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