Q39.The major product in the following reaction is: JEE Main 2020 (03 Sep Shift 2) JEE Main Previous Year Paper (1) (2) (3) (4)
What This Question Tests
This multi-step reaction problem requires applying Markovnikov's rule for HBr addition to an alkene, followed by an E2 elimination reaction using a strong base to determine the major product.
Concepts Tested
📚 NCERT Sections This Tests
7.7 — Predict The Major Product Of Acid Catalysed Dehydration Of
Chemistry Class 12 · Chapter 7
7.7 Predict the major product of acid catalysed dehydration of (i) 1-methylcyclohexanol and (ii) butan-1-ol
6.21 — Primary Alkyl Halide C4H9Br (A) Reacted With Alcoholic Koh To Give Compound (B).
Chemistry Class 12 · Chapter 6
6.21 Primary alkyl halide C4H9Br (a) reacted with alcoholic KOH to give compound (b). Compound (b) is reacted with HBr to give (c) which is an isomer of (a). When (a) is reacted with sodium metal it gives compound (d), C8H18 which is different from the compound formed when n-butyl bromide is reacted with sodium. Give the structural formula of (a) and write the equations for all the reactions.
7.10 — Hbr
Chemistry Class 12 · Chapter 7
7.10 HBr C2 H5 OH C2 H5 Br CH3 – CH2 – CH – CH – ONa + C 2H5 Br CH3 – CH2 – CH – CH – OC2 H5 CH3 CH3 CH3 CH3 2-Ethoxy-3-methylpentane 225 Alcohols, Phenols and Ethers Reprint 2025-26
📋 Question Details
- Chapter
- Hydrocarbons
- Topic
- Reactions of alkenes (HBr addition) and elimination reactions (E2)
- Year
- 2020
- Shift
- 03 Sep Shift 2
- Q Number
- Q39
- Type
- MCQ
- NCERT Ref
- Class 11 Chemistry Ch 13: Hydrocarbons; Class 12 Chemistry Ch 10: Haloalkanes and Haloarenes
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