What is the half-life of a radioactive s...

What is the half-life of a radioactive substance if `75%` of its given amount disintegrate in `60` min ?

A

120 min

B

30 min

C

45 min

D

20 min

Verified by Experts

The correct Answer is:

B

75% of the substance disintegrates in two half lives 2 half lives = 60 min. `therefore t_(1//2) = 30` min

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