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JEE Main & Advanced Chemistry Hydrocarbons / हाइड्रोकार्बन Question Bank Alkene

  • question_answer
    Which one of the following reactions would be the best for the formation of 2-bromobutane [MP PET 1994] (1) \[C{{H}_{3}}CH=CHC{{H}_{2}}C{{H}_{3}}\xrightarrow{HBr}\] (2) \[C{{H}_{3}}C{{H}_{2}}CH=C{{H}_{2}}\xrightarrow{HBr}\] (3) \[C{{H}_{3}}CH=CHC{{H}_{3}}\xrightarrow{B{{r}_{2}}}\] (4) \[C{{H}_{3}}C{{H}_{2}}CH=C{{H}_{2}}\underset{\text{Peroxide}}{\mathop{\xrightarrow{HBr}}}\,\]

    A) 1

    B) 2

    C) 3

    D) 4

    Correct Answer: B

    Solution :

    \[C{{H}_{3}}-C{{H}_{2}}-CH=C{{H}_{2}}\xrightarrow{HBr}\]\[\underset{\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\text{2}-\text{Bromo}\,\text{butane}}{\mathop{C{{H}_{3}}-C{{H}_{2}}-\underset{\underset{Br\,}{\mathop{|\,\,\,\,}}\,}{\mathop{CH}}\,-C{{H}_{3}}}}\,\]


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