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  3. CEE Kerala Engineering

CEE Kerala Engineering CEE Kerala Engineering Solved Paper-2006

  • question_answer
    The sequence that correctly describes the relative bond strength pertaining to oxygen molecule and its cation or anions is:

    A) \[O_{2}^{2-}>O_{2}^{-}>{{O}_{2}}>O_{2}^{+}\]

    B) \[{{O}_{2}}>O_{2}^{+}>O_{2}^{-}>O_{2}^{2-}\]

    C) \[O_{2}^{+}>{{O}_{2}}>O_{2}^{2-}>O_{2}^{-}\]

    D) \[O_{2}^{+}>{{O}_{2}}>O_{2}^{-}>O_{2}^{2-}\]

    E) \[{{O}_{2}}>O_{2}^{-}>O_{2}^{2-}>O_{2}^{+}\]

    Correct Answer: D

    Solution :

    Bond order of oxygen molecule = 2 Bond order of oxygen molecule ion =2.5 Bond order of superperoxide ion\[(O_{2}^{-})=1.5\] Bond order of peroxide ion \[(O_{2}^{2-})=1\] Hence, the order of bond strength is as: \[O_{2}^{+}>{{O}_{2}}>O_{2}^{-}>O_{2}^{2-}\]


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