JEE Main & Advanced Chemistry Hydrocarbons / हाइड्रोकार्बन Question Bank Alkene

  • question_answer
    When butene-1 is mixed with excess of bromine, the expected reaction product is [CPMT 1974; BHU 1980]

    A) 1, 2-dibromobutane

    B) 1, 1-dibromobutane

    C) 2, 2-dibromobutane

    D) Perbromobutane

    Correct Answer: A

    Solution :

     \[C{{H}_{3}}-C{{H}_{2}}-CH=C{{H}_{2}}+B{{r}_{2}}\to \underset{1,2\text{-dibromo butane}}{\mathop{C{{H}_{3}}-C{{H}_{2}}-\underset{\underset{Br\,\,}{\mathop{|\,\,\,\,\,}}\,}{\mathop{CH}}\,-\underset{\underset{Br\,\,}{\mathop{|\,\,\,\,\,\,}}\,}{\mathop{C{{H}_{2}}}}\,}}\,\]


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