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Major product of dehydrohalogenation of an alkyl halide with alcoholic KOH or an alkoxide

This type of question, asked 6 times: 20 Apr 2025 S1, 11 Apr 2026 S2, 20 Apr 2026 S2, 13 May 2026 S1, 14 May 2026 S1, 14 May 2026 S2. All 6 questions below, oldest first.

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  1. Question 1

    20 Apr 2025 S1

    73
    Identify the product ' X ' formed in the following reaction, Sodium ethoxide + Isopropyl chloride ⟶X+ Ethanol + Sodium chloride \longrightarrow X +\text{~Ethanol + Sodium chloride~}

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  2. Question 2

    11 Apr 2026 S2

    39
    Identify the major product of dehydrohalogenation of CH3-CH2-CH(Br)-CH3\mathrm{CH_3\text{-}CH_2\text{-}CH(Br)\text{-}CH_3}.

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  3. Question 3

    20 Apr 2026 S2

    37
    What is the major product formed when 2-bromopentane reacts with alcoholic KOH?

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  4. Question 4

    13 May 2026 S1

    36
    What is the major product of the reaction of (CH3)3C−Br\mathrm{(CH_3)_3C{-}Br} with CH3ONa\mathrm{CH_3ONa} ?

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  5. Question 5

    14 May 2026 S1

    39
    Identify the product obtained when 1-Chlorobutane is reacted with alc. KOH.

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  6. Question 6

    14 May 2026 S2

    37
    Identify the major product obtained when 2-Bromobutane is heated with alcoholic KOH.

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