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Standard XII
Physics
NCERT
Question

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 N0 and that of Q are N0. Half-life of P (for conversion to R) is 1 minute where as that of Q is 2 minutes. 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 :
  1. 2N0
  2. 3N0
  3. 9N02
  4. 5N02

A
5N02
B
3N0
C
2N0
D
9N02
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