Chemistry - Chemical Kinetics Question with Solution | TestHub

Rate of the following reaction may be gives as
${\mathrm{C}}_6{\mathrm{H}}_5{\mathrm{N}}_2\mathrm{C}\mathrm{l}+\mathrm{H}\mathrm{O}\mathrm{H}\to {\mathrm{C}}_6{\mathrm{H}}_5\mathrm{O}\mathrm{H}+{\mathrm{N}}_2+\mathrm{H}\mathrm{C}\mathrm{l}$
Rate$=\mathrm{k}\left[{\mathrm{C}}_6{\mathrm{H}}_5{\mathrm{N}}_2\mathrm{C}\mathrm{l}\right]\left[\mathrm{H}\mathrm{O}\mathrm{H}\right]$
For hydrolysis, water will be in large excess, therefore, concentration of water will be constant. Rate law may be given as
Rate$={\mathrm{k}}^{\text{'}}\left[{\mathrm{C}}_6{\mathrm{H}}_5{\mathrm{N}}_2\mathrm{Cl}\right]$
Reaction is therefore a pseudo unimolecular reaction.