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KVPY Sample Paper KVPY Stream-SX Model Paper-31

  • question_answer
    In the isoelectronic series of metal carbonyl, the \[CO\]bond strength is expected to increase in the order-

    A) \[{{[Mn{{(CO)}_{6}}]}^{+}}<[Cr{{(CO)}_{6}}]<{{[V{{(CO)}_{6}}]}^{-}}\]

    B) \[{{[V{{(CO)}_{6}}]}^{-}}<[Cr{{(CO)}_{6}}]<{{[Mn{{(CO)}_{6}}]}^{+}}\]

    C) \[{{[V{{(CO)}_{6}}]}^{-}}<{{[Mn{{(CO)}_{6}}]}^{+}}<[Cr{{(CO)}_{6}}]\]

    D) \[[Cr{{(CO)}_{6}}]<{{[Mn{{(CO)}_{6}}]}^{+}}<{{[V{{(CO)}_{6}}]}^{-}}\]

    Correct Answer: B

    Solution :

    CO bond strength is reciprocal to the extent of back donation involved in synergic bonding i.e. \[M\,\,\,\,CO\]


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