JEE Main & Advanced Chemistry Hydrocarbons / हाइड्रोकार्बन Question Bank Alkene

  • question_answer
    Aqueous sulphuric acid reacts with 2-methyl-1-butene to give predominantly [Roorkee 1992]

    A) Isobutyl hydrogen sulphate

    B) 2-methyl-2-butanol

    C) 2-methyl-1-butanol

    D) Secondary butyl hydrogen sulphate

    Correct Answer: B

    Solution :

    \[\begin{array}{*{35}{l}}    \,\,\,\,\,\,\,\,\,\,\,\,\,\,C{{H}_{3}}  \\    C\underset{2-\text{methyl-1-butane}}{\mathop{{{H}_{2}}=\overset{|}{\mathop{C}}\,-C{{H}_{2}}-C{{H}_{3}}}}\,+{{H}_{2}}O\underset{\text{Markownikoff }\!\!'\!\!\text{ s rule}}{\mathop{\xrightarrow{{{H}_{2}}S{{O}_{4}}}}}\,  \\ \end{array}\]\[\underset{2-\text{Methyl-2-butanol}}{\mathop{\begin{array}{*{35}{l}}    \ \ \ \ \ \ \ \,\,\,C{{H}_{3}}  \\    C{{H}_{3}}-\underset{|}{\overset{|}{\mathop{C}}}\,-C{{H}_{2}}-C{{H}_{3}}  \\    \ \ \ \ \ \ \ \,\ OH  \\ \end{array}}}\,\]


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