JEE Main & Advanced Chemistry Hydrocarbons / हाइड्रोकार्बन Question Bank Alkene

  • question_answer
    Propene when heated with chlorine at about \[{{500}^{o}}C\] forms [MP PET 1997]

    A) \[C{{H}_{2}}Cl.CH=C{{H}_{2}}\]

    B) \[C{{H}_{3}}.CHCl.C{{H}_{2}}Cl\]

    C) \[C{{H}_{2}}Cl.CHCl.C{{H}_{2}}Cl\]

    D) All the three

    Correct Answer: A

    Solution :

    \[C{{H}_{3}}-CH=C{{H}_{2}}+C{{l}_{2}}\xrightarrow{{{500}^{o}}C}\]\[\underset{\underset{Cl\,\,\,}{\mathop{|\,\,\,\,\,\,\,\,}}\,}{\mathop{C{{H}_{2}}}}\,-CH=C{{H}_{2}}+HCl\] This reaction is called allylic halogenation reaction because halogenation occurs at the allylic position of an alkene


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