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Which of the following is the red oxide of iron?

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Which of the following is the red oxide of iron?

(a) Haematite

(b) Limonite

(c) Pyrite

(d) Siderite

I have been asked this question during an online interview.

The doubt is from Ferrous Metals in portion Air Conditioning, Thermal Insulation, Stones & Ferrous Metals of Construction & Building Materials

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The correct option is (a) Haematite

Best explanation: Haematite is the red oxide of iron. It contains about 65-70 % of the iron in its pure state. It is available in the state of Madhya Pradesh in India.

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