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Two radioactive nuclei P and Q, in a giv...

Two radioactive nuclei `P` and `Q`, in a given sample decay into a stable nucleus `R`. At time `t = 0`, number of `P` species are `4 N_0` and that of `Q` are `N_0`. Half-life of `P` (for conversation to `R`) is `1mm` whereas that of `Q` is `2 min`. Initially there are no nuclei of `R` present in the sample. When number of nuclei of `P` and `Q` are equal, the number of nuclei of `R` present in the sample would be :

A

`(5N_0)/2`

B

`2N_0`

C

`3N`

D

`(9N_0)/2`

Text Solution

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The correct Answer is:
D
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