question_answer

Which of the following is formed on reaction of acetaldehyde with HCN followed by hydrolysis?

A)  Butyl alcohol    

B)  Acetic acid

C)  Oxalic acid         

D)  Lactic acid

Correct Answer: D

Solution :

                 Acetaldehyde gives acetaldehyde de cyanohydrin with HCN and on the hydrolyis of cyanohydrin lactic acid is formed.                                 Note - In lactic acid carbon atom is attached by four different groups. So, it is optical active compound.