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Friday, 9 October

JEE Main Chemistry · Haloalkanes and Haloarenes

Double Elimination to Alkynes

Double Elimination to Alkynes (Haloalkanes and Haloarenes) was asked once in the 42 JEE Main shifts Lumi analysed, in 2025.

Times asked
1
in 1 shift
Years
2025
Usual format
Single correct
Multi-step
Pattern
New since 2024
asked once so far

How it is asked

  • Predict product of reaction sequence

Difficulty

Easy 0Medium 1Hard 0

Where it sits

Chapter: Haloalkanes and Haloarenes. Topic: Alkenes and Alkynes, 32 questions over 15 ideas.

Other repeat ideas in this topic

Every time it came

The question

Newest first, each with its options and official answer.

  1. 8 Apr 2025, Shift 2 · Q651,2-dibromocyclooctane →(ii) NaNH2 (iii) Hg2+/H+ (iv) Zn–Hg / H+(i) KOH (alc.)\xrightarrow[\text{(ii) NaNH}_2\ \text{(iii) Hg}^{2+}/\text{H}^+\ \text{(iv) Zn–Hg / H}^+]{\text{(i) KOH (alc.)}}…MediumSingle correctHas a figure