RAJASTHAN ­ PET Rajasthan PET Solved Paper-2006

  • question_answer
    Which of the following compound exists in optically active forms?

    A)  \[C{{H}_{3}}-\underset{\begin{smallmatrix}  | \\  C{{H}_{3}} \end{smallmatrix}}{\mathop{CH}}\,-C{{H}_{2}}OH\]

    B)  \[C{{H}_{3}}-C{{H}_{2}}-C{{H}_{2}}OH\]

    C)  \[C{{H}_{3}}C{{H}_{2}}-\underset{\begin{smallmatrix}  | \\  OH \end{smallmatrix}}{\mathop{CH}}\,-C{{H}_{3}}\]

    D)  \[C{{H}_{3}}{{(C{{H}_{2}})}_{3}}-C{{H}_{2}}OH\]

    Correct Answer: C

    Solution :

     2-butanol exists in optically active forms due to the presence of asymmetric carbon atom \[C{{H}_{3}}C{{H}_{2}}-\underset{\begin{smallmatrix}  | \\  OH \end{smallmatrix}}{\overset{\begin{smallmatrix}  H \\  | \end{smallmatrix}}{\mathop{{{C}^{*}}}}}\,-C{{H}_{3}}\] \[{{C}^{*}}=\]asymmetric carbon atom.


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