JEE Main & Advanced Chemistry Hydrocarbons / हाइड्रोकार्बन Question Bank Alkene

  • question_answer
    At low temperatures, the slow addition of molecular bromine to \[C{{H}_{2}}=CH-C{{H}_{2}}-C\equiv CH\] gives [Roorkee Qualifying 1998]

    A) \[C{{H}_{2}}=CH-C{{H}_{2}}-CBr=CHBr\]

    B) \[BrC{{H}_{2}}-CHBr-C{{H}_{2}}-C\equiv CH\]

    C) \[C{{H}_{2}}=CH-C{{H}_{2}}-C{{H}_{2}}-CB{{r}_{3}}\]

    D) \[C{{H}_{3}}-CB{{r}_{2}}-C{{H}_{2}}-C\equiv CH\]

    Correct Answer: A

    Solution :

    \[C{{H}_{2}}=CH-C{{H}_{2}}-C\equiv CH+B{{r}_{2}}\to \]\[C{{H}_{2}}=CH-C{{H}_{2}}-\underset{\underset{Br}{\mathop{|}}\,\,\,\,}{\mathop{C=}}\,\underset{\underset{Br\,}{\mathop{|\,\,\,\,}}\,}{\mathop{CH}}\,\]


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