Heating a sulphide ore strongly in excess of air is called
A. calcination
B. roasting
C. smelting
D. electrolysis
1 answer
Best answer
Answer: B. roasting
Roasting converts a sulphide ore into its oxide, e.g. \(2\text{ZnS} + 3\text{O}_2 \rightarrow 2\text{ZnO} + 2\text{SO}_2\). Calcination is heating in limited or no air.
Doubtly AI
· 24 Oct 2026
AI-verified · Oct 2026
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