JEE Main 2026 — Apr 5, Shift 1 — Chemistry solution

JEE Main2026Apr 5, Shift 1Chemistry

Given below are two statements :

Statement I : On the basis of inductive effect, the order of stability of alkyl carbanions is $CH_{3}^{-} > CH_{3} CH_{2}^{-} > (CH_{3})_{2} CH^{-} > (CH_{3})_{3} C^{-}$ .

Statement II : Allyl and benzyl carbanions are more stabilised by inductive effect and not by resonance effect.

In the light of the above statements choose the correct answer from the options given below :

A
Both Statement I and Statement II are correct
B
Both Statement I and Statement II are incorrect
C
Statement I is correct and Statement II is incorrect
D
Statement I is incorrect and Statement II is correct

Solution

Statement I: Alkyl groups are electron-donating by hyperconjugation/induction. Increasing alkyl substitution destabilises the negative charge on a carbanion, so the stability order $CH_{3}^{-} > 1^{\circ} > 2^{\circ} > 3^{\circ}$ is correct.

Statement II: Allyl and benzyl carbanions are stabilised primarily by resonance delocalisation of the negative charge into the adjacent $π$ system, not by induction. Incorrect.

← Back to full paper

Practice more Chemistry

Concept-wise practice with instant solutions on Fundamenthol.

Start practicing →