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CMC Medical CMC-Medical VELLORE Solved Paper-2015

  • question_answer
    What is the correct order of the basic strength of the following?

    A)  I > II > III                             

    B)  I > III > II

    C)  III > II > I                             

    D)  III > I > II

    E)  III \[\simeq \]II > I

    Correct Answer: A

    Solution :

                    I > II > III is the correct order of basicity. ?                   \[N{{O}_{2}}\] is an electron withdrawing group, thus nitro-anilines are less basic than aniline. ?                   (III) is less basic than (II) because \[-N{{O}_{2}}\] is closer and exerts a stronger electron withdrawing or \[-I\]-effect.


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