Q.

Consider the following molecules:

The correct order of rate of hydrolysis is:                  [2025]

1 r > q > p > s  
2 q > p > r > s  
3 p > r > q > s  
4 p > q > r > s  

Ans.

(4)

Hydrolysis of acid derivatives is a nucleophilic elimination reaction. For such reactions rate of reaction is acid chloride > anhydride > ester > amide.