NEETChemistryAldehydes and Ketones
Given below are two statements: one is labelled as Assertion (A) and the other is labelled as Reason (R). Assertion (A): Benzoyl chloride is reduced to benzyl alcohol by passing hydrogen gas over a palladium catalyst supported on barium sulfate. Reason (R): Barium sulfate acts as a catalytic poison that prevents the further reduction of benzaldehyde to benzyl alcohol. In the light of the above statements, choose the
Options
- ABoth (A) and (R) are true and (R) is the correct explanation of (A).
- BBoth (A) and (R) are true but (R) is not the correct explanation of (A).
- C(A) is true but (R) is false.
- D(A) is false but (R) is true.
Correct answer
D. (A) is false but (R) is true.
Step-by-step solution
The Assertion (A) is false. When benzoyl chloride is treated with hydrogen gas over a palladium catalyst supported on barium sulfate (Rosenmund reduction), it is reduced to benzaldehyde, not benzyl alcohol. The Reason (R) is true. Barium sulfate acts as a catalytic poison that partially deactivates the palladium catalyst. This controlled activity prevents the further reduction of the formed benzaldehyde into benzyl alcohol. Answer: (A) is false but (R) is true.