Distinguish between roasting and calcination which of the two is used for sulphide ores and why
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Calcination: It is the process in which carbonate ores of the metals are decomposed into oxides by heating them in the absence or limited air. ... Out of roasting and calcination, only roasting is used for sulphide ores. This is because it is easier to obtain metal from its oxide as compared to its sulphide.
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