Question

Crossed Cannizzaro reaction can be given by following combination

• A. $C{H}_{3}CHO,HCHO$
• B. $C_6{H}_{5}CHO,C{H}_{3}CHO$
• C. $C_6{H}_{5}CHO,HCHO$
• D. All of these

Answer 1

The correct option is C $C_6{H}_{5}CHO,HCHO$

Answer (c) - $C_6{H}_{5}CHO,HCHO$
The reaction between aldehydes containing no $\alpha$ -hydrogen atom and strong base is known as crossed Cannizzaro reaction.
Only option (c) has a pair of aldehyde without a $\alpha$-hydrogen.

Aldehyde which has highly electrophilic carbonyl carbon will undergo oxidation to form carboxylic acid salts and aldehyde with less electrophilic carbonyl carbon will undergo reduction to form alcohol.