NEET Chemistry Chemical Bonding and Molecular Structure / रासायनिक आबंधन एवं आणविक संरचना NEET PYQ-Chemical Bonding Molecular

  • question_answer
    Which one of   the following is not paramagnetic?                                                   [AIPMT 2000]

    A)  NO  

    B)                   \[N_{2}^{+}\]           

    C)  CO     

    D)  \[O_{2}^{-}\]

    Correct Answer: C

    Solution :

    Paramagnetic character is shown by those atoms or molecules which have unpaired electrons.
                In the given compounds CO is not paramagnetic since it does not have unpaired electrons. The configuration of CO molecule is
                \[CO(14)=\sigma 1{{s}^{2}},\,\sigma *\,1{{s}^{2}},\,\sigma 2{{s}^{2}},\,\sigma *\,2{{s}^{2}},\,\sigma 2p_{x}^{2},\]
                \[\pi 2p_{y}^{2},\,\pi 2p_{z}^{2}\]


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