BCECE Medical BCECE Medical Solved Papers-2005

  • question_answer
    Which of the following compound does not show anti-Markownikoffs addition?

    A)  Propene       

    B)  1-butene

    C)  2-butene

    D)  2-pentene

    Correct Answer: C

    Solution :

    Key Idea: Anti Markownikoffs addition is shown when unsymmetrical reagent reacts with unsymmetrical double or triple bond containing compound. \[\underset{\begin{smallmatrix}  (a) \\  propene \end{smallmatrix}}{\mathop{C{{H}_{3}}-CH=C{{H}_{2}}}}\,\,\,\,\,\,\underset{\begin{smallmatrix}  butene-1 \\  (b) \end{smallmatrix}}{\mathop{C{{H}_{3}}C{{H}_{2}}-CH=C{{H}_{2}}}}\,\]                 \[\underset{\begin{smallmatrix}  butene-2 \\  (a) \end{smallmatrix}}{\mathop{C{{H}_{3}}-CH=CH-C{{H}_{3}}}}\,\]       \[\underset{propene-2}{\mathop{C{{H}_{3}}-C{{H}_{2}}-CH=CH-C{{H}_{3}}}}\,\] \[\because \] Choice [c] butene-2 is symmetrical alkene \[\therefore \] It does not show Anti Markownikoff addition.


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