question_answer

                A carbonyl compound reacts with hydrogen cyanide to form cyanohydrin which on hydrolysis forms a racemic mixture of  \[\alpha \]-hydroxy acid. The carbonyl compound is:                                              

A)                  acetaldehyde  

B)                  acetone             

C)                  diethyl ketone    

D)                  formaldehyde

Correct Answer: A

Solution :

                                   If it is racemic mixture, therefore such ?C? atom must be asymmetric carbon atom.