question_answer

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

A)                       

B)  

C)                       

D)  

Correct Answer: A

Solution :

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