Chemistry - Carbonyl compounds Question with Solution | TestHub

When a mixture of $\mathrm{CO}$ and $\mathrm{HCl}$ gas is passed through benzene in presence of catalyst consisting anhydrous ${\mathrm{AlCl}}_3$, benzaldehyde is formed. $\mathrm{CO}+\mathrm{HCl}\to \mathrm{HOCl}$ formyl chloride ${\mathrm{C}}_6{\mathrm{H}}_6+\mathrm{HOCl}\stackrel{{\mathrm{AlCl}}_3}{⟶}{\mathrm{C}}_6{\mathrm{H}}_5\mathrm{CHO}+\mathrm{HCl}$