What is the oxidation state of central metal ion in [Fe(CN)_6]^ 4- complex?

MHT CET 2024 Chemistry question

What is the oxidation state of central metal ion in complex?

(A)+2Correct
(B)-6
(C)-4
(D)+3

Answer: (A)

Solution

Let the oxidation state of Fe be . The cyanide ligand carries a charge of and there are six of them, and the overall charge of the complex ion is . So , giving . The central metal ion is

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Question ID VK-094883