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  4. [ Fe II ( O 2)( CN )4 Cl ]4- is named as

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Q. $\left[ Fe ^{ II }\left( O _{2}\right)( CN )_{4} Cl \right]^{4-}$ is named as

Coordination Compounds

Solution:

Option (C) is correct. $\left[ Fe \left( O _{2}\right)( CN ){ }_{4} Cl \right]^{4-}$ is named as chlorotetracyanosuperoxoferrate (II) ion. In the complex iron is in $+2$ oxidation state, so $O _{2}$ acts as superoxo having $-1$ oxidation state $\left( O _{2}^{-}\right)$