Question

Carbonate and sulphide ores are usually converted into oxides during the process of extraction

Answer 1

Answer:

The process of conversion of carbonate ore to oxide ore is known as calcination.

The process of conversion of sulphide ore to oxide ore by heating with excess supply of oxygen is known as roasting.

Answer 2

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The conversion of metal carbonates and sulphides to metals is very difficult and economically, it is worst. But metal oxides to metal conversion is easy. So they are converted to oxides.