WB JEE Medical WB JEE Medical Solved Paper-2006

  • question_answer
    The bond order of \[\text{O}_{\text{2}}^{\text{+}}\] is the same as in :

    A)  \[\text{N}_{2}^{+}\]                                     

    B)  \[C{{N}^{-}}\]

    C)  \[CO\]                                 

    D)  \[N{{O}^{+}}\]

    Correct Answer: A

    Solution :

                     \[O_{2}^{+}(15{{e}^{-}})=K\,{{K}^{*}}{{({{\sigma }^{*}}2s)}^{2}}\] \[{{(\sigma 2{{p}_{x}})}^{2}}{{(\pi 2{{p}_{y}})}^{2}}{{(\pi 2{{p}_{z}})}^{2}}\] \[{{({{\pi }^{*}}2{{p}_{y}})}^{1}}{{({{\pi }^{*}}2{{p}_{z}})}^{0}}\] Hence, bond order \[=\frac{1}{2}(10-5)=2.5\] \[N_{2}^{+}(13{{e}^{-}})=K\,{{K}^{*}}{{(\sigma 2s)}^{2}}{{({{\sigma }^{*}}2s)}^{2}}{{({{\sigma }^{*}}2{{p}_{x}})}^{2}}\] \[{{(\pi 2{{p}_{y}})}^{2}}{{(\pi 2{{p}_{z}})}^{1}}\] Hence, bond order \[=\frac{1}{2}(9-4)=2.5\]


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