CET Karnataka Engineering CET - Karnataka Engineering Solved Paper-2006

  • question_answer
    Which of the following is diamagnetic?

    A)  \[H_{2}^{+}\]                                   

    B)  \[{{O}_{2}}\]

    C)  \[L{{i}_{2}}\]                                     

    D)  \[He_{2}^{+}\]

    Correct Answer: C

    Solution :

    Molecules or ion having no unpaired electrons are diamagnetic e.g.,                 \[L{{i}_{2}}=6{{e}^{-}}=\sigma 1{{s}^{2}},\overset{*}{\mathop{\sigma }}\,1{{s}^{2}},\sigma 2{{s}^{2}}\]


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