JCECE Engineering JCECE Engineering Solved Paper-2009

  • question_answer
    Which of the following compound is expected to be optically active?

    A) \[{{(C{{H}_{3}})}_{2}}CHCHO\]  

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

    C)  \[C{{H}_{3}}C{{H}_{2}}CHBrCHO\]          

    D)  \[C{{H}_{3}}C{{H}_{2}}CB{{r}_{2}}CHO\]

    Correct Answer: C

    Solution :

    Compounds having asymmetric \[C-\]atom are optically active,\[eg,\] \[C{{H}_{3}}-C{{H}_{2}}{{-}^{*}}\underset{\begin{smallmatrix}  | \\  Br \end{smallmatrix}}{\overset{\begin{smallmatrix}  H \\  | \end{smallmatrix}}{\mathop{C}}}\,-CHO\]\[(C=\]asymmetric\[C-\]atom) The \[C-\]atom whose four valencies are satisfied by four different groups is called asymmetric \[C-\]atom.


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