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MCQMediumJEE Main 2026 · 22 January, Shift 2Alkynes (Acidic Nature, Reactions)

Chemistry Question from JEE Main 2026 · 22 January, Shift 2

Consider the following reaction:

Reaction scheme: 1,2-dibromobutane, $$\mathrm{CH_3CH_2CH(Br)CH_2Br}$$, drawn as a skeletal zig-zag with one bromine on the terminal carbon and one on the adjacent carbon, is treated with $$2\,\mathrm{NaNH_2}$$ to give intermediate $$X$$; $$X$$ is then treated with (i) $$\mathrm{NaNH_2}$$ and (ii) isopropyl bromide to give $$Y$$.

The product YY formed is:

  • A

    2-methylhex-3-yne

  • B

    2-methylhex-2-yne

  • C

    5-methylhex-2-yne

  • D

    Isopropylbut-1-yne

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