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A radioactive element X with half life 2...

A radioactive element X with half life 2 h decays giving a stable element Y. After a time t, ratio of X and Y atoms is 1:16 .Time t is

A

6 h

B

4 h

C

8 h

D

16 h

Text Solution

Verified by Experts

The correct Answer is:
C
`N/N_0=(1/2)^n=1/16`
`therefore` n=4
`t=nT_(1//2)=4xx2`=8 h
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