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The activity of a radioactive sample goe...

The activity of a radioactive sample goes down to about 6% in a time of 2 hour. The half-life of the sample in minute is about

A

(a) 30

B

(b) 15

C

(c) 60

D

(d) 120

Text Solution

Verified by Experts

The correct Answer is:
A
Activity of atoms is 6.25% after four half-lives.
`:.` Four half-lives`~~2h=120min`
`:.` One half-life is 30 min.
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