JEE Main & Advanced JEE Main Paper (Held On 09-Jan-2019 Evening)

  • question_answer
                In which of the following processes, the bond order has increased and paramagnetic character has changed to diamagnetic? [JEE Main Online Paper (Held On 09-Jan-2019 Evening]

    A) \[NO\,\,\to \,\,N{{O}^{+}}\]    

    B)               \[{{O}_{2}}\to {{O}_{{{2}^{+}}}}\]

    C) \[{{N}_{2}}\,\,\to \,\,{{N}_{{{2}^{+}}}}\]     

    D)               \[{{O}_{2}}\,\,\to \,\,{{O}_{{{2}^{2-}}}}\]

    Correct Answer: A

    Solution :

    Process Change in Magnetic nature Bond order change
    \[{{N}_{2}}\,\,\to \,\,{{N}_{2}}^{+}\] \[Dia\,\,\to \,Para\] \[3\,\,\to \,\,2.5\]
    \[NO\,\,\to \,\,N{{O}^{+}}\] \[Para\,\,\to \,dia\] \[2.5\,\to \,3\]
    \[{{O}_{2}}\,\,\to \,\,{{O}_{2}}^{-2}\] \[Para\,\to \,dia\] \[2\to 1\]
    \[{{O}_{2}}\,\,\to \,\,{{O}_{{{2}^{+}}}}\] \[Para\,\to \,Para\] \[2\to 2.5\]


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