Question

Assertion (A) Ester hydrolysis is fast in the beginning and becomes slow after sometime.
Reason (R) The rate of ester hydrolysis increases with the increase in the amount of carboxylic acid produced

• A. Both $A$ and $R$ are correct; and $R$ is the correct explanation of $A$.
• B. Both $A$ and $R$ are correct; but $R$ is not the correct explanation of $A$.
• C. $A$ is correct ; but $R$ is incorrect.
• D. $R$ is correct ; but $A$ is incorrect.

Answer 1

Answer: (D)

Ester hydrolysis is slow in the beginning and becomes fast after sometime because a small amount of dilute sulphuric acid is added in the begining to start the reaction. As the reaction proceeds, $RCOOH$ is produced. The rate of ester hydrolysis increases with the increase in the amount of carboxylic acid produced.