Sulphide ions react with to form a purple coloured compound

CHEMISTRY · Single correct · CBSE · Chemistry · Redox Reactions · Redox Reactions

Problem

Sulphide ions react with Na2[Fe(NO)(CN)5]\text{Na}_2[\text{Fe}(\text{NO})(\text{CN})_5] to form a purple coloured compound Na4[Fe(CN)5(NOS)]\text{Na}_4[\text{Fe}(\text{CN})_5(\text{NOS})] . In the reaction, the oxidation state of iron: (1) Changes from +2 to +3 (2) Changes from +3 to +2 (3) Changes from +2 to +4 (4) Does not change

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