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

II, III in haematite and III in magnetite

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II, III in haematite and II in magnetite

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II in haematite and II, III in magnetite

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III in haematite and II, III in magnetite

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Solution

The correct option is D III in haematite and II, III in magnetite
Hematite is $F e_{2} O_{3}$
The oxidation state of $F e$ in $F e_{2} O_{3}$ is +3.

Magnetite is mixed oxide of $F e_{3} O_{4} (F e O . F e_{2} O_{3})$
It contains both $F e^{2 +}$ and $F e^{3 +}$ ions in $1 : 2$ ratio.

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