Chemistry - Carbonyl compounds Question with Solution | TestHub

Toluene can be oxidized to benzaldehyde with a solution of chromyl chloride $\left(\mathrm{C}\mathrm{r}{\mathrm{O}}_2\mathrm{C}{\mathrm{l}}_2\right)\mathrm{ }\mathrm{i}\mathrm{n}\mathrm{ }\mathrm{C}{\mathrm{S}}_2\mathrm{ }\mathrm{o}\mathrm{r}\mathrm{ }\mathrm{C}\mathrm{C}{\mathrm{l}}_4.$ This is known as Etard's reaction.

Further oxidation of benzaldehyde to benzoic acid is avoided by protection of carbonyl group.