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

II, III hematite and III in magnetite

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II, III in hematite and II, III in magnetite

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II in hematite and II, III is magnetite

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III in hematite and II & III in magnetite

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Solution

The correct option is D III in hematite and II & III in magnetite
In haematite $(F e_{2} O_{3})$ oxidation number of Fe is $2 x + 3 (- 2) = 0$ ; $x = 3$
Magnetite $(F e_{3} O_{4})$ is an equimolar mixture of Fe O of $(F e_{2} O_{3})$
$∴$ oxidation number of iron is Fe O is 2 and in $(F e_{2} O_{3})$ is 3

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2. Chhatisgarh has the highest reserves of hematite ore in India.

3. Hematite and magnetite are the two most important iron ores found in India.

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i) Hematite and magnetite are the two most important iron ores in India

ii) Karnataka has more than half of the reserves of magnetite ore in India.

Select the correct answer using the code given below:

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