Chemistry - Chemical Kinetics Question with Solution | TestHub

A reaction$\mathrm{A}\to \mathrm{B}$, involves following mechanism
Step 1$\mathrm{A}\stackrel{{\mathrm{k}}_1}{\to }\mathrm{B}\left(\mathrm{f}\mathrm{a}\mathrm{s}\mathrm{t}\right)$
Step 2$\mathrm{B}\stackrel{{\mathrm{k}}_2}{\to }\mathrm{C}\left(\mathrm{s}\mathrm{l}\mathrm{o}\mathrm{w}\right)$
Step 3$\mathrm{C}\stackrel{{\mathrm{k}}_3}{\to }\mathrm{D}\left(\mathrm{f}\mathrm{a}\mathrm{s}\mathrm{t}\right)$
The rate law of the reaction may be given as