question_answer

Compound A undergoes formation of cyanohydrin which on hydrolysis gives lactic aci\[(C{{H}_{3}}CH(OH)COOH).\]Therefore, compound A is

A)  Acetaldehyde      

B)  Acetone

C)  Benzaldehyde      

D)  Formaldehyde

Correct Answer: A

Solution :

Acetaldehyde on reaction with HCN forms acetaldehyde cyanohydrins which upon acid catalysed hydrolysis forms an\[\alpha -\]hydroxyl acid, i.e., lactic acid. Hence, the correct option is [a].