JEE Main 2026 — Apr 2, Shift 2 — Chemistry solution

JEE Main2026Apr 2, Shift 2Chemistry

Correct statements regarding alkyl halides (R $-$ X) among the following are :

(A) Alcohol being less polar solvent as compared to water, alcoholic KOH favours elimination reaction with R $-$ X.

(B) Order of reactivity towards S $_{N}$ 1 mechanism is C $_{6}$ H $_{5}$ -CH $_{2}$ -Cl $>$ C $_{6}$ H $_{5}$ -CHCl-C $_{6}$ H $_{5}$ .

(D) Vinyl chloride is an example of haloalkene and allyl chloride is an example of haloalkyne.

(E) R $-$ Cl can be prepared by reacting R $-$ OH with SOCl $_{2}$ but Ar $-$ Cl cannot be prepared by reacting Ar $-$ OH with SOCl $_{2}$ .

Choose the correct answer from the options given below :

A
A, B and C Only
B
B and D Only
C
A and E Only
D
D and E Only

Solution

(A) True. Alcoholic KOH (less polar than aqueous KOH) favours elimination ( $E 2$ ) over substitution.

(B) False. S $_{N}$ 1 reactivity tracks carbocation stability; the diphenylmethyl cation (Ph $_{2}$ CH $^{+}$ ) is more stable than benzyl cation (PhCH $_{2}^{+}$ ) due to additional resonance, so C $_{6}$ H $_{5}$ CHCl-C $_{6}$ H $_{5}$ is more reactive than C $_{6}$ H $_{5}$ CH $_{2}$ Cl in S $_{N}$ 1.

(C) False. Aryl halides are far less reactive than alkyl halides toward nucleophilic substitution because of C $-$ X bond strengthening (partial double-bond character) and ring electron density.

(D) False. Allyl chloride (CH $_{2}$ =CH $-$ CH $_{2}$ Cl) is a haloalkene, not a haloalkyne.

(E) True. SOCl $_{2}$ converts aliphatic alcohols smoothly to alkyl chlorides, but phenols do not react this way to give aryl chlorides (the C $-$ O bond in Ar $-$ OH has partial double-bond character).

Correct statements: A and E.

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