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What is the formula of hematite?

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in Chemistry – Class 12 by (188k points)
What is the formula of hematite?

(a) Fe3O4

(b) FeSO4.7H2O

(c) Fe2O3

(d) FeCl3

The question was asked by my school principal while I was bunking the class.

The query is from D and F-Block Elements topic in chapter D and F-Block Elements of Chemistry – Class 12

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Best answer
Right choice is (c) Fe2O3

Best explanation: Ferric oxide(Fe2O3) occurs in nature as haematite. It is a red powder, insoluble in H2O and not acted upon by air or H2O. It is amphoteric in nature and reacts with acids and alkalis and used as a catalyst in the oxidation of CO to CO2 in the Bosch process.

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