Correct statements regarding alkyl… - JEE Main 2026 Chemistry PYQ

JEE Main 2026 — Chemistry Organic Chemistry

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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 $C_6 H_5 - CH_2 - Cl > C_6 H_5 - CHCl - C_6 H_5$ .

C. Non substituted aryl halides exhibit properties similar to alkyl halides.

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:

Official previous-year question

Held on 2 Apr 2026 · Verified 6 Jul 2026.

Options

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

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Solution

Statement A is correct. Alcoholic KOH provides alkoxide ions which are stronger bases than hydroxide ions. Furthermore, alcohol is a less polar solvent than water, which decreases the solvation of the base, making it more effective for elimination reactions over substitution.

Statement B is incorrect. The reactivity towards the $S_N^1$ mechanism depends on the stability of the intermediate carbocation. The carbocation $C_6H_5-\overset{+}{C}H-C_6H_5$ is more stable than $C_6H_5-\overset{+}{C}H_2$ due to extended resonance stabilization from two phenyl rings. Thus, $C_6H_5-CHCl-C_6H_5$ is more reactive than $C_6H_5-CH_2-Cl$ .

Statement C is incorrect. Aryl halides are much less reactive towards nucleophilic substitution than alkyl halides due to the partial double bond character of the C-X bond arising from resonance, as well as the $sp^2$ hybridization of the carbon atom.

Statement D is incorrect. Allyl chloride ( $CH_2=CH-CH_2-Cl$ ) contains a carbon-carbon double bond, making it a haloalkene, not a haloalkyne.

Statement E is correct. Alkyl chlorides ( $R-Cl$ ) can be easily prepared from alcohols ( $R-OH$ ) using $SOCl_2$ . However, phenols ( $Ar-OH$ ) do not react with $SOCl_2$ to give aryl chlorides because the C-O bond in phenol has a partial double bond character due to resonance, making it difficult to cleave.

Therefore, only statements A and E are correct.

Answer: A and E Only

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