CET Karnataka Medical CET - Karnataka Medical Solved Paper-2013

  • question_answer
    The number of antibonding electrons present in \[{{O}_{2}}\] molecular ion is

    A)  \[8\]     

    B)  \[6\]

    C)  \[5\]     

    D)  \[4\]

    E)  None of the Above

    Correct Answer: E

    Solution :

    : \[O_{2}^{-}(17):\,KK\,\sigma 2{{s}^{2}}\,\sigma *2{{s}^{2}}\,\sigma 2p_{z}^{2},\] \[\pi 2p_{x}^{2}=\pi 2p_{y}^{2},{{\pi }^{*}}2p_{x}^{2}={{\pi }^{*}}2p_{y}^{1}\] No. of bonding\[{{e}^{-}}=10\]; no. of antibonding \[{{e}^{-}}=7\]


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