JEE Main 2023ChemistryHaloalkanes and HaloarenesMediumMCQ

JEE Main 2023Haloalkanes and Haloarenes Question with Solution

JEE Main 2023 (29 Jan Shift 2)

Question

The one giving maximum number of isomeric alkenes on dehydrohalogenation reaction is (excluding rearrangement)

Choose an option

Show full solutionCorrect option: C
Correct answer
C2-Bromopentane

Step-by-step explanation

In dehydrohalogenation reactions, the preferred product is that alkene which has the greater number of alkyl groups attached to the doubly bonded carbon atoms. Thus, 2-bromopentane gives pent-2-ene as the major product.

Rest all bromides are having only one type of beta hydrogen, hence, only one possible alkene is formed.

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About this question

This is a previous-year question from JEE Main 2023, covering the Haloalkanes and Haloarenes 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.