JEE Main 2026 — Alcohols Phenols and Ethers Question with Solution
JEE Main 2026 (23 January Shift 1)
Question
The correct sequence of reagents for the above conversion of X to Y is :
Choose an option
Show full solutionCorrect option: D
Correct answer
D(i) NaOEt; \ \ \ (ii) ; \ \ \ (iii) Jones reagent
Step-by-step explanation
The transformation of (X) benzene with Br and CH₃ substituents to (Y) benzene with CH₂COOH requires:
First, NaOEt causes elimination of HBr to form an alkene intermediate.
Second, B₂H₆/H₂O₂ performs hydroboration-oxidation, adding hydroxyl group in anti-Markovnikov fashion to yield a primary alcohol.
Third, Jones reagent oxidizes the primary alcohol to carboxylic acid.
The sequence NaOEt → B₂H₆/H₂O₂ → Jones reagent produces the desired carboxylic acid product.
First, NaOEt causes elimination of HBr to form an alkene intermediate.
Second, B₂H₆/H₂O₂ performs hydroboration-oxidation, adding hydroxyl group in anti-Markovnikov fashion to yield a primary alcohol.
Third, Jones reagent oxidizes the primary alcohol to carboxylic acid.
The sequence NaOEt → B₂H₆/H₂O₂ → Jones reagent produces the desired carboxylic acid product.
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This is a previous-year question from JEE Main 2026, covering the Alcohols Phenols and Ethers chapter of Chemistry. PrepSharp catalogues every PYQ from JEE Main with a verified answer key and step-by-step solution prepared by IIT alumni — so you can search by chapter, topic or year and revise efficiently.