JEE Main & Advanced Chemistry Chemical Bonding and Molecular Structure / रासायनिक आबंधन एवं आणविक संरचना Question Bank Molecular orbital theory

  • question_answer
    Which of the following is paramagnetic  [DPMT 2005]

    A)                 \[{{N}_{2}}\]     

    B)                 \[{{C}_{2}}\]

    C)                 \[N_{2}^{+}\]   

    D)                 \[O_{2}^{2-}\]

    Correct Answer: C

    Solution :

    \[{{N}_{2}}:KK\sigma {{(2s)}^{2}}\sigma *{{(2s)}^{2}}\pi {{(2{{p}_{x}})}^{2}}\pi {{(2{{p}_{y}})}^{2}}\sigma {{(2{{p}_{z}})}^{2}}\]                             (diamagnetic) \[{{C}_{2}}:KK\sigma {{(2s)}^{2}}\sigma *{{(2s)}^{2}}\pi {{(2{{p}_{x}})}^{2}}\pi {{(2{{p}_{y}})}^{2}}\]                                                               (diamagnetic) \[N_{2}^{+}:KK\sigma {{(2s)}^{2}}\sigma *{{(2s)}^{2}}\pi {{(2{{p}_{x}})}^{2}}\pi {{(2{{p}_{y}})}^{2}}\sigma {{(2{{p}_{z}})}^{2}}\]                             (paramagnetic) \[O_{2}^{2-}:KK\sigma {{(2s)}^{2}}\sigma *{{(2s)}^{2}}\sigma {{(2{{p}_{z}})}^{2}}\pi {{(2{{p}_{x}})}^{2}}\pi {{(2{{p}_{y}})}^{2}}\]\[\pi *{{(2{{p}_{x}})}^{2}}\pi *{{(2{{p}_{y}})}^{2}}\]                       (diamagnetic)


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