NEET Physics Nuclei Questions Solved

Two radioactive nuclei P and Q, in a given sample decay into a stable nucleous R. At time t=0, number of P species are 4N0 and that of Q are N0 and that of Q are N0.Half -life of P(for conversion to R) is 1 min where as 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)3N0                                          (b)9N02

(c)5N02                                       (d)2N0

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