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JEE Main & Advanced JEE Main Paper (Held on 08-4-2019 Afternoon)

  • question_answer
    Among the following molecules / ions, \[C_{2}^{2-},N_{2}^{2-},O_{2}^{2-},{{O}_{2}}\] which one is diamagnetic and has the shortest bond length?             [JEE Main 8-4-2019 Afternoon]

    A) \[C_{2}^{2-}\]         

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

    C) \[O_{2}^{{}}\]                    

    D)   \[O_{2}^{2-}\]

    Correct Answer: A

    Solution :

    Chemical Species Bond Order Magnetic behavior
    \[C_{2}^{2-}\] 3 Diamagnetic
    \[N_{2}^{2-}\] 2 Paramagnetic
    \[{{O}_{2}}\] 2 Paramagnetic
    \[O_{2}^{2-}\] 1 diamagnetic
    \[B.O.\propto \frac{1}{bond\,length}\]           


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