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A radioactive element A with a half-valu...

A radioactive element `A` with a half-value period of `2` hours decays giving a stable element `Y`. After a time `t` the ratio of `X` and `Y` atoms is `1 : 7` then `t` is :

A

6 hours

B

8 hours

C

10 hours

D

12 hours

Text Solution

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The correct Answer is:
A
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