Hydrocarbons Ques 63

63. Given:

The enthalpy of the hydrogenation of these compounds will be in the order as :

[2015]

(a) III $>$ II $>$ I

(b) II $>$ III $>$ I

(c) II $>$ I $>$ III

(d) I $>$ II $>$ III

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Answer:

Correct Answer: 63.(a)

Solution:

  1. (a) Enthalpy of hydrogenation

$ \propto \frac{1}{\text{ stability of alkene }} $

$ \therefore \quad \text{ III }>\text{ II }>\text{ I } $



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