CMC Medical CMC-Medical VELLORE Solved Paper-2009

  • question_answer
    Which of the following compounds shows optical isomerism?

    A)  \[C{{H}_{3}}-CH-BrCOOH\]

    B)  \[C{{H}_{2}}OHC{{H}_{2}}-COOH\]

    C)  \[COOHCHBr-COOH\]

    D)  \[C{{H}_{2}}Br-C{{H}_{2}}-COOH\]

    Correct Answer: A

    Solution :

                     Optical isomerism is exhibited by asymmetric compounds. Compounds having chiral carbon atom are usually asymmetric and exhibit optical isomerism. \[C{{H}_{3}}\overset{*}{\mathop{CH}}\,(Br)COOH,\] due to the presence of chiral carbon atom, exhibits optical isomerism. [\[\overset{*}{\mathop{C=H}}\,\]chiral carbon, the carbon four valencies of which are attached with four different groups.]


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