QAIPM-2011-Ph-1818: NEET 2011 Physics - Class 12 AIPM-2011-Ph-1818 Solution: Two radioactive nuclei P and Q in a given sample decay into a…

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 $4N_0$ and that of Q are $N_0$. 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 $2N_0$ $3N_0$ $\frac{9N_0}{2}$ $\frac{5N_0}{2}$