Question

In the Rosenmund reduction, the catalyst used is :

• A. $Pd/BaS{O}_4$
• B. Raney $Ni$
• C. $Sn/HCl$
• D. $Zn/HCl$

Answer 1

Answer: (A)

$Pd/BaS{O}_4$

The Rosenmund reaction is a hydrogenation process where molecular hydrogen reacts with acyl chloride in the presence of palladium or barium sulfate catalyst.

Barium sulfate reduces the activity of palladium due to its low surface area, thereby preventing over reduction.

Hence the correct option is 'A'