Question

What is(are) true regarding catalytic hydrogenation of alkene and alkyne ?

• A. It is exothermic in nature
• B. Heterogeneous catalyst may bring about hydrogenation
• C. Homogeneous catalyst may bring about hydrogenation
• D. It proceeds through a free redical intermediate

Answer 1

Answer: (A), (B), (C)

It is exothermic in nature
Heterogeneous catalyst may bring about hydrogenation
Homogeneous catalyst may bring about hydrogenation

a) Hydrogenation of unsaturated hydrocarbons are all exothermic
b) H2/Pt is heterogeneous catalyst in hydrogenation reaction
c) Hydroboration followed by treatment with RCOOH is an example of homogenous catalysis
d) Reaction proceeds through adsorption mechanism rather free radical mechanism rather free radical mechanism

So options A,B & Care correct.

Hence options A,B & C are correct.