Q.

The half-life of a radioactive substance depends upon

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a

the external pressure on it

b

the mass of the substance

c

the strength of the nuclear force between the nucleons of its atoms.

d

its temperature

answer is D.

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Detailed Solution

Half life of a substance doesn't depends upon amount, temperature and pressure. It depends upon the nature of the substance, i.e. the strength of the nuclear force between the nucleons of its atoms.

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