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Major alkene from acid-catalysed dehydration of an alcohol

This type of question, asked 5 times: 9 May 2023 S2, 21 Apr 2025 S1, 25 Apr 2025 S1, 16 Apr 2026 S2, 15 May 2026 S2. All 5 questions below, oldest first.

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  1. Question 1

    9 May 2023 S2

    84
    Identify the major product formed when 2-Methylhexan-3-ol is heated with concentrated sulphuric acid.

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  2. Question 2

    21 Apr 2025 S1

    93
    Identify the major product formed  [\ ^{\lbrack}when 2-Methylhexan-3-ol is heated with concentrated sulphuric acid.

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  3. Question 3

    25 Apr 2025 S1

    93
    Which of the following forms 2-Methylbut-2-ene on heating with concentrated sulphuric acid?

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  4. Question 4

    16 Apr 2026 S2

    40
    Identify the product X in the following reaction. (CH3)3C−CH(OH)−CH3+H2SO4⟶X(major product)\mathrm{(CH_3)_3C{-}CH(OH){-}CH_3 + H_2SO_4 \longrightarrow \underset{\text{(major product)}}{X}}

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  5. Question 5

    15 May 2026 S2

    41
    Which of the following most readily gives 22-Methylbut-22-ene on heating with concentrated sulphuric acid ?

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