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Two isotopes P and Q atomic weight 10 an...

Two isotopes `P` and `Q` atomic weight `10` and `20`, respectively are mixed in equal amount by weight. After `20` days their weight ratio is found to be `1:4`. Isotope `P` has a half-life of `10` days. The half-life of isotope `Q` is

A

zero

B

`5` days

C

`20` days

D

infinite

Text Solution

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The correct Answer is:
D
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