alleryHeating a sulfide ore strongly in excess air converts it to an oxide. This step is called:
Acalcination
Bsmelting
Croasting
Delectrolysis
Answer & Solution
Correct answer: C. roasting
Roasting = heating in excess air (for sulfides).
Calcination = limited air (for carbonates).
The aim of both is to obtain the oxide for the next reduction step.
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