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Q. The role of $BaSO_{4}$ in Rosenmund's reactions is:

NTA AbhyasNTA Abhyas 2020

Solution:

$RCOCl+H_{2}\overset{P d / B a S O_{4}}{ \rightarrow } \, RCHO+HCl$
In this reaction, $BaSO_{4}$ decreases the activity of palladium.