Punjab Medical Punjab - MET Solved Paper-2003

  • question_answer
    Which of the following is paramagnetic?

    A) \[CO\]                                  

    B) \[{{N}_{2}}\]

    C) \[{{O}_{2}}\]                                     

    D) \[{{H}_{2}}{{O}_{2}}\]

    Correct Answer: C

    Solution :

    Oxygen \[({{O}_{2}})\] contains 2 unpaired electron, hence it is paramagnetic.                 \[{{O}_{2}}=\sigma 1{{s}^{2}},\,\,\sigma *1{{s}^{2}}\sigma *2{{s}^{2}}\sigma 2p_{x}^{2}\]                 \[\pi 2p_{y}^{2}\pi 2p_{z}^{2}\pi *2p_{y}^{1}\pi *2p_{z}^{1}\]


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