Question

For the given reaction sequence choose the correct option(s):

• A. $A$ is :
  
• B. $B$ is :
  
• C. $A$ is :
  
• D. $B$ is :
  

Answer 1

Answer: (C), (D)

$B$ is :


In the first step, the methyl group of toluene is brominated in presence of bromine and light to obtain benzyl bromide (A), In the second step, the Br atom of Benzyl bromide is displaced with cyano group by treatment with KCN. in the last step, cyano group is hydrolyzed to carboxylic group in acidic medium (B).