JEE Main & Advanced Sample Paper JEE Main Sample Paper-21

  • question_answer
    Which of the following MO has LUMO (lowest unoccupied molecular orbital) for \[{{B}_{2}}\] molecule?

    A)  \[\sigma 2{{p}_{x}}\]                           

    B)  \[\sigma *2{{p}_{x}}\]

    C)  \[\pi 2{{p}_{y}}\] 

    D)  \[\pi *2{{p}_{y}}\]

    Correct Answer: C

    Solution :

                            Boron \[({{B}_{2}}):\,{{(\sigma 1s)}^{2}}\,{{({{\sigma }^{*}}1s)}^{2}}\,{{(\sigma 2s)}^{2}}\,{{({{\sigma }^{*}}\,2s)}^{2}}({{\pi }^{2}}p_{x}^{1}\]\[=\pi 2p_{y}^{1})\,{{(\sigma {{p}_{z}})}^{0}}\]


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