JEE Main & Advanced JEE Main Paper (Held On 9 April 2014)

  • question_answer
    Which of the following has unpaired electron(s)?   [JEE Main Online Paper ( Held On 09 Apirl  2014  )

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

    B) \[O_{2}^{-}\]

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

    D) \[N_{2}^{2-}\]

    Correct Answer: B

    Solution :

    \[O_{2}^{-}(17)=KK{{(\sigma 2s)}^{2}}(\sigma *2{{s}^{2}}){{(\sigma 2{{p}_{x}})}^{2}}\] \[{{(\pi 2{{p}_{y}})}^{2}}{{(\pi 2{{p}_{z}})}^{2}}{{(\pi *2{{p}_{y}})}^{2}}{{(\pi *2{{p}_{z}})}^{1}}\] one unpaired electron - Paramagnetic.


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