Question

The catalyst used in Rosenmund reaction is

• A. Zn / Hg
• B. Pd / BaSO₄
• C. Raney Ni
• D. Na in Ethanol

Hint:

In the Rosenmund reduction, palladium on barium sulfate is used to selectively reduce acyl chlorides to aldehydes.

Answer 1

The Correct Option is B

Step 1: Understanding Rosenmund reaction.
In the Rosenmund reduction, an acyl chloride is reduced to an aldehyde using palladium on barium sulfate (Pd / BaSO₄) as a catalyst.

Step 2: Conclusion.
Thus, the correct catalyst is option (B).

Final Answer: \[ \boxed{\text{(B) Pd / BaSO₄}} \]