JEE Main & Advanced AIEEE Solved Paper-2008

  • question_answer
    In which of the following octahedral complexes of Co (atomic number 27), will the magnitude of \[{{\Delta }_{o}}\]be the highest?       AIEEE  Solved  Paper-2007

    A) \[{{[Co{{({{H}_{2}}O)}_{6}}]}^{3+}}\]      

    B) \[{{[Co{{(N{{H}_{3}})}_{6}}]}^{3+}}\]

    C)                        \[{{[Co{{(CN)}_{6}}]}^{3-}}\]

    D)        \[{{[Co{{({{C}_{2}}{{O}_{4}})}_{3}}]}^{3-}}\]

    Correct Answer: C

    Solution :

                    Magnitude of \[{{\Delta }_{o}}\] will be highest with the strongest ligand. Since, \[C{{N}^{-}}\] is the strongest ligand of all, thus would lead to a greater separation between \[{{t}_{{{2}_{g}}}}\] and \[{{e}_{g}}\] orbitals.


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