Question

what I calcination and roasting​

Answer 1

Answer:

calcination is the process of heating in the absence of oxygen while roasting is the process of heating the substance in the presence of oxygen

Answer 2

When Sulphide ores of metal are heated strongly in the presence of excess of air to convert Ores into metal oxides is called roasting.

when Carbonate ores of metals are heated strongly in limited air to convert them into meatl oxides is called calcination

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