JIPMER Jipmer Medical Solved Paper-1996

  • question_answer
    The number of possible optical isomers of lactic acid are:

    A)  2                                            

    B)  4                            

    C)  many                   

    D)         none of these

    Correct Answer: A

    Solution :

    Lactic has only one chiral carbon atom, hence, it has only 2 isomers possible, which are d- and \[l\]-lactic acid. \[H-\underset{COOH}{\overset{C{{H}_{3}}}{\mathop{\underset{|}{\overset{|}{\mathop{{{C}^{*}}}}}\,}}}\,-OH,\underset{d\text{-}\,\text{and}\,l\text{-lactic}\,\text{acid}}{\mathop{HO-\underset{COOH}{\overset{C{{H}_{3}}}{\mathop{\underset{|}{\overset{|}{\mathop{{{C}^{*}}}}}\,}}}\,-H}}\,\]


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