Chemistry - Chemical Kinetics Question with Solution | TestHub

A flask contains a mixture of compounds$\mathrm{A}$and$\mathrm{B}$. Both compounds decompose by first-order kinetics. The half-lives for$\mathrm{A}$and$\mathrm{B}$are$300 \mathrm{s}$and$180 \mathrm{s}$, respectively. If the concentrations of$\mathrm{A}$and$\mathrm{B}$are equal initially, the time required for the concentration of A to be four times that of$\mathrm{B}$(in s) is :$(\mathrm{Use} \ln 2=0.693)$