Question

Although alkenes are more reactive than alkynes towards addition reaction, reverse is true regarding catalytic hydrogenation. Explain.

Answer 1

This is due to the stability of conjugate base ofalkyne by sp hybridized carbon atom. 2)In electrophilic substitution,alkynes are less reactivethan alkenes. It is because of relative stability of carbocation formed in the case of alkenes. 3)In case of hydrogenation reactions,alkynes are more reactivethan alkenes
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