question_answer

Which one of the following alkenes will react faster with \[{{H}_{2}}\] under catalytic hydrogenadon conditions? (R = Alkyl substituent)

A)  

B)              

C)              

D)  

Correct Answer: A

Solution :

Stability of alkene \[\propto \frac{\text{1}}{\text{Heat of hydrogenation of alkene}}\] Greater the number of alkyl groups attached to the doubly bonded carbon atoms, more stable is the alkene. Hence, given alkene follow the following order of stability. Hence, faster hydrogenation in