A) \[{{[Fe{{(OH)}_{5}}]}^{3-}}\]
B) \[{{[FeC{{l}_{6}}]}^{3-}}\]
C) \[{{[Fe{{(CN)}_{6}}]}^{3-}}\]
D) \[{{[Fe{{({{H}_{2}}O)}_{6}}]}^{3+}}\]
Correct Answer: C
Solution :
Stability of complex increases with increase in charge on the central metal ion and increase with basic strength of ligand. In \[{{[Fe{{(CN)}_{6}}]}^{3-}}\] oxidation state of Fe is \[+3\] and basicity of \[C{{N}^{-}}\] is higher than \[O{{H}^{-}},C{{l}^{-}}\] and \[{{H}_{2}}O\].
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