Sulphur removal by heating of pyrite ore in presence of air is called its ____________________?
Correct answer: B. Roasting
- A. Reduction
- B. Roasting
- C. Calcination
- D. Smelting
Explanation
Heating pyrite in air oxidises its sulphur to sulphur dioxide, while the iron remains mainly as an oxide. This operation is called roasting, whereas calcination is heating in limited or no air.
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