WB JEE Medical WB JEE Medical Solved Paper-2010

  • question_answer
    The bond order of CO molecule is

    A)  2                                            

    B)  2.5    

    C)  3                                            

    D)  3.5

    Correct Answer: C

    Solution :

                     \[CO(6+8=14)\sigma {{(1s)}^{2}},{{\sigma }^{*}}{{(1s)}^{2}},\sigma {{(2s)}^{2}},{{\sigma }^{*}}{{(2s)}^{2}},\] \[\pi {{(2{{p}_{x}})}^{2}}\approx \pi {{(2{{p}_{y}})}^{2}},\sigma {{(2{{p}_{z}})}^{2}}\] \[B.O=\frac{{{N}_{b}}-{{N}_{a}}}{2}=\frac{10-4}{2}=3\]


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