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

6 h

4 h

8 h

16 h

Text Solution

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The correct Answer is:

`(N)/(N_(0))=((1)/(2))^(n)=(1)/(16) therefore n=4`
`t=nT_(1//2)=4xx2=8h`

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