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For a radioactive material , half-life i...

For a radioactive material , half-life is 10 minutes . If initially there are 600 number of nuclei , the time taken (in minutes ) for the disintegration of 450 nuclei is

A

3

B

10

C

20

D

15

Text Solution

Verified by Experts

The correct Answer is:
C
`(N/N_0)=(1/2)^(t//T)`
Now we get , `(600-450)/600 =(1/2)^(t//10)`
or , `t/10=2` or , t=20 min
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