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Predict the correct intermediate and product in the following reaction …

NEET UG 2017 — Chemistry Organic Chemistry

2017mcqmedium

Predict the correct intermediate and product in the following reaction

H3C−C≡CH→HgSO4H2O, H2SO4intermediate→product(A)(B)\begin{matrix} {\text{H}}_{3} \text{C} - \text{C} \equiv \text{CH} & \overset{ {\text{H}}_{2} \text{O} \text{, } {\text{H}}_{2} {\text{SO}}_{4} }{ \underset{{\text{HgSO}}_{4}}{\rightarrow } } & \text{intermediate} & \rightarrow & \text{product} \\ & & \text{(A)} & & \text{(B)} \end{matrix}H3​C−C≡CH​HgSO4​→​H2​O, H2​SO4​​​intermediate(A)​→​product(B)​

Official previous-year question

Held on 30 Apr 2017 · Verified 9 Jul 2026.

Options

  1. A

    A : H3C−C|SO4=CH2B : H3C−C||O−CH3\begin{matrix} \text{A : } {\text{H}}_{3} \text{C} - \underset{\underset{{\text{SO}}_{4}}{\text{|}}}{\text{C}} = {\text{CH}}_{2} & \text{B : } {\text{H}}_{3} \text{C} - \underset{\underset{\text{O}}{\text{||}}}{\text{C}} - {\text{CH}}_{3} \end{matrix}A : H3​C−SO4​|​C​=CH2​​B : H3​C−O||​C​−CH3​​

  2. B

    A : H3C−C|OH=CH2B : H3C−C|SO4=CH2\begin{matrix} \text{A : } {\text{H}}_{3} \text{C} - \underset{\underset{\text{OH}}{\text{|}}}{\text{C}} = {\text{CH}}_{2} & \text{B : } {\text{H}}_{3} \text{C} - \underset{\underset{{\text{SO}}_{4}}{\text{|}}}{\text{C}} = {\text{CH}}_{2} \end{matrix}A : H3​C−OH|​C​=CH2​​B : H3​C−SO4​|​C​=CH2​​

  3. C

    A : H3C−C||O−CH3B : H3C−C≡CH\begin{matrix} \text{A : } {\text{H}}_{3} \text{C} - \underset{\underset{\text{O}}{\text{||}}}{\text{C}} - {\text{CH}}_{3} & \text{B : } {\text{H}}_{3} \text{C} - \text{C} \equiv \text{CH} \end{matrix}A : H3​C−O||​C​−CH3​​B : H3​C−C≡CH​

  4. D

    A : H3C−C|OH=CH2B : H3C−C||O−CH3\begin{matrix} \text{A : } {\text{H}}_{3} \text{C} - \underset{\underset{\text{OH}}{\text{|}}}{\text{C}} = {\text{CH}}_{2} & \text{B : } {\text{H}}_{3} \text{C} - \underset{\underset{\text{O}}{\text{||}}}{\text{C}} - {\text{CH}}_{3} \end{matrix}A : H3​C−OH|​C​=CH2​​B : H3​C−O||​C​−CH3​​

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