Question

Alkynes can be reduced to alkenes by hydrogenation in presence of

• A. Raney $Ni$
• B. Anhy. $AlC{l}_3$
• C. $Pd$
• D. Lindlar’s catalyst

Answer 1

Answer: (D)

$CH\equiv CH\underset{\text{Catalyst}}{\overset{\text{Lindlar}}{\to }}C{H}_2=C{H}_2$.
Lindlar catalyst prevents further reduction of ethene to ethane