JEE Main & Advanced Chemistry Hydrocarbons / हाइड्रोकार्बन Question Bank Alkene

  • question_answer
    When alcoholic solution of ethylene dibromide is heated with granulated zinc, the compound formed is [CPMT 1990]

    A) Ethylene

    B) Ethyne

    C) Cyclobutane

    D) Butane

    Correct Answer: A

    Solution :

    \[\underset{Br\,\,}{\mathop{\underset{|\,\,\,\,\,\,\,}{\mathop{C{{H}_{2}}}}\,}}\,-\underset{Br\,\,\,}{\mathop{\underset{|\,\,\,\,\,\,\,\,}{\mathop{C{{H}_{2}}}}\,}}\,+Zn\to ZnB{{r}_{2}}+C{{H}_{2}}=C{{H}_{2}}\]


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