Chemistry - Ionic Equilibrium Question with Solution | TestHub

Lewis acidic strength
$\mathrm{B}{\mathrm{F}}_3<\mathrm{B}\mathrm{C}{\mathrm{l}}_3<\mathrm{B}\mathrm{B}{\mathrm{r}}_3<\mathrm{B}{\mathrm{I}}_3$
As$\mathrm{B}{\mathrm{I}}_3$is strongest Lewis acid among all boron halides due to back bonding therefore, heat of adduct formation will be maximum numerically, for$\mathrm{B}{\mathrm{I}}_3$.