Question
What is Lindlar's catalyst? Give its use.
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Answer
Lindlar's catalyst is $\mathrm{Pd} / \mathrm{BaSO}_4$. It is used to convert alkynes to alkenes with the help of H , e.g., But-2yne, on reduction with $\mathrm{Pd}-\mathrm{BaSO}_4$ forms cis-2-butene.
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