Question

Assertion (A): Hydrolysis of an ester follows first order kinetics.
Reason (R): The concentration of water does not get altered much during the reaction.

• A. Both Assertion (A) and Reason (R) are true and Reason (R) is the correct explanation of the Assertion (A).
• B. Both Assertion (A) and Reason (R) are true, but Reason (R) is not the correct explanation of the Assertion (A).
• C. Assertion (A) is true, but Reason (R) is false.
• D. Assertion (A) is false, but Reason (R) is true.

Hint:

For ester hydrolysis, remember that water concentration is typically treated as constant due to its large excess. The kinetics depend on the concentration of the ester.

Answer 1

The Correct Option is B

The hydrolysis of an ester follows first-order kinetics when the concentration of water remains virtually constant during the reaction, as stated in Reason (R). However, the reason that the reaction follows first-order kinetics is not because of the water concentration, but rather the rate-determining step in the reaction mechanism. Thus, Reason (R) is true, but not the correct explanation for Assertion (A).