RAJASTHAN PMT Rajasthan - PMT Solved Paper-2007

  • question_answer
    Optical isomerism is shown by

    A) propanol-2         

    B)        butanol-2           

    C)        ethanol                               

    D)        methanol

    Correct Answer: B

    Solution :

    Optical isomerism is shown by an asymmetric carbon atom which has a carbon atom attached to four different atoms or groups. So, butanol-2 is optically active.                 \[{{H}_{3}}C-C{{H}_{2}}-\underset{\begin{smallmatrix}  | \\  O{{H}_{2}} \end{smallmatrix}}{\overset{\begin{smallmatrix}  H \\  | \end{smallmatrix}}{\mathop{C}}}\,-C{{H}_{3}}\]


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