KVPY Sample Paper KVPY Stream-SX Model Paper-4

  • question_answer
    Consider the following compounds:  Basic nature of above compounds is in the order as:

    A) I > II > III        

    B) I > II > III

    C) II > III > I                    

    D) III > II > I

    Correct Answer: A

    Solution :

    Basic nature of a compound depends upon the ease with which it can donate its unshared pair of electrons.
    I. electron donating group. (Maximum basic)
    II. electron withdrawing. The lone pair of N is involved in resonance with \[C{{H}_{3}}CO.\]
    III. Lone-pair of N-atom is also used in delocalization of \[\pi -\]electrons, resonance of carbonyl benzene nucleus (least basic)
    Thus, the correct order of basic nature of given compounds are as follows: I > II > III.

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