NTA Abhyas JEE Main2020ChemistryGeneral Principles and Processes of Isolation of MetalsPractice

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

Options

AII, III in haematite and III in magnetite
BII, III in haematite and II in magnetite
CII in haematite and II, III in magnetite
DIII in haematite and II, III in magnetite

Correct answer

D. III in haematite and II, III in magnetite

Step-by-step solution

Hematite is a common iron oxide with a formula of F e 2 O 3 so Fe in it has +3 oxidation state. Magnetite is a rock mineral and one of the main iron ores, with the chemical formula F e 3 O 4 o r F e 2 O 3 . F e O .so it is a mixed oxide with oxidation states of Fe as +3 and +2.

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