Which of the following has the maximum heat of hydrogenation?

Question

Which of the following has the maximum heat of hydrogenation? (A)  (B)  (C)  (D)

Tardigrade Admin · Accepted Answer

As the conjugation increases, heat of hydrogenation decreases. Thus alkene with two isolated double bonds has the highest heat of hydrogenation.

Q. Which of the following has the maximum heat of hydrogenation?