A) \[{{[Fe{{F}_{6}}]}^{3-}}\]
B) \[{{[Mn{{(CN)}_{6}}]}^{4-}}\]
C) \[{{\left[ Co{{F}_{6}} \right]}^{3-}}\]
D) \[{{[Co{{(N{{H}_{3}})}_{6}}]}^{2+}}\]
Correct Answer: A
Solution :
[a] Symmetrically filled \[{{t}_{2g}}\] and \[{{e}_{g}}\] are those, which contain equal distribution of electrons.\[{{[Fe{{F}_{6}}]}^{3-}}\] | \[\left\{ \begin{align} & equal\,distribution\,of \\ & electrons\,in\,orbitals \\ & {{t}_{2g}}\,and\,\,{{e}_{g}} \\ \end{align} \right\}\] | |
\[{{[Mn{{(CN)}_{6}}]}^{4-}}\] | Unequal distribution of electrons in orbitals | |
\[{{[Co{{F}_{6}}]}^{3-}}\] | Unequal distribution of electrons | |
\[{{[Co{{(N{{H}_{3}})}_{6}}]}^{2+}}\] | Unequal distribution of electrons in orbitals |
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