Question

Reaction between formaldehyde and benzaldehyde in presence of concentrated $NaOH$ is known as:

• A. Cannizzaro’s reaction
• B. Cross Cannizzaro’s reaction
• C. Cross Aldol condensation
• D. Aldol condensation

Answer 1

The correct option is B Cross Cannizzaro’s reaction

• Aldehydes which do not have an $\alpha$-hydrogen atom, undergo self-oxidation and reduction (disproportionation) reaction on heating with concentrated alkali.

• $HCHO$ and $C_6{H}_{5}CHO$, in presence of conc. $NaOH$ undergo cross Cannizzaro’s reaction.