JAMB - Chemistry (2024 - No. 76)

The IUPAC nomenclature of the complex K\(_4\)Fe(CN)\(_6\) is

potassium hexacyanoferrate(II)

potassium hexacyanoferrate(III)

potassium hexacyanoferrate(IV)

potassium hexacyanoferrate(VI)

The naming starts with the first metal which is potassium, followed by the hexacyano (6 moles of Cyanide) and then ferrate (II).