Arrange the following alkenes in decreasing order of stabil…

Chemistry General Organic Chemistry JEE Main 2026 Single Correct MCQ

Published by: CGP EDU Academic Team

Published on: August 13, 2026

Arrange the following alkenes in decreasing order of stability.
(I) (II)

(III) (IV)
Choose the correct answer from the options given below:

(III

(II)

(I)

(IV)

(I)

(III)

(IV)

(II)

(III)

(I)

(II)

(IV)

(I)

(III)

(II)

(IV)

Text Solution

Verified by Experts

The correct answer is:

Alkene stability increases with the degree of alkyl substitution on the double bond due to hyperconjugation and inductive stabilization effects.

Analyzing each structure:
(I) is tetrasubstituted (4 alkyl groups attached to the two carbons), the most stable.
(III) appears to be a disubstituted alkene with specific geometry providing enhanced stability.
(II) is trisubstituted (3 alkyl groups and 1 hydrogen).
(IV) is also disubstituted but with different geometry, less stable than III.
The decreasing order of stability: tetrasubstituted trisubstituted disubstituted variations.
Therefore: I III II IV.