Redox and Equivalent ConceptHard

Question

Sulphide ions react with Na4[Fe(NO)(CN)5] to form a purple-coloured compound Na4[Fe(CN)5(NOS)]. In the reaction, the oxidation state of iron

Options

A.changes from +2 to +3.
B.changes from +2 to +4.
C.changes from +3 to +2.
D.does not change.

Solution

Oxidation state of Fe is +2 in both as NO− and NOS− are the ligands.

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