Chemistry - Chemical Kinetics Question with Solution | TestHub

In the reaction of formation of sulphur trioxide by contact process $2{\mathrm{SO}}_2+{\mathrm{O}}_2\rightleftharpoons 2{\mathrm{SO}}_3$ the rate of reaction was measured as $\frac{\mathrm{d}\left[{\mathrm{O}}_2\right]}{\mathrm{dt}}=-2.5\times 10^{-4}\mathrm{mol}{\mathrm{L}}^{-1}{\mathrm{s}}^{-1}$. The rate of reaction is terms of $\left[{\mathrm{SO}}_2\right]$ in $\mathrm{mol}{\mathrm{L}}^{-1}{\mathrm{s}}^{-1}$ will be: