JEE Main & Advanced Chemistry Hydrocarbons / हाइड्रोकार्बन Question Bank Alkene

  • question_answer
    A mixture of 1-chloropropane and 2-chloropropane when treated with alcoholic KOH gives [NCERT 1990]

    A) 1-propene

    B) 2-propene

    C) Isopropylene

    D) All the three

    Correct Answer: A

    Solution :

    \[C{{H}_{3}}C{{H}_{2}}C{{H}_{2}}Cl+KOH\to \]\[C{{H}_{3}}-CH=C{{H}_{2}}+KCl+{{H}_{2}}O\]      \[\begin{array}{*{35}{l}}    C{{H}_{3}}-\underset{|}{\mathop{C}}\,H-C{{H}_{3}}+KOH\to C{{H}_{3}}-CH=C{{H}_{2}}+KCl+{{H}_{2}}O  \\    \ \ \ \ \ \ \ \ Cl  \\ \end{array}\]


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