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Question:

Oxidation states of the metal in the minerals haematite and magnetite, respectively are?

II, III in haematite and III in magnetite

II, III in haematite and II in magnetite

III in haematite and II, III in magnetite

II in haematite and II, III in magnetite

Solution:

In haematite (Fe₂O₃), Fe is present in (III) oxidation state and in magnetite (Fe₃O₄), Fe is present in (II) and (III) oxidation state.