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| 1. |
Differentiate between roasting and calcination with the help of suitable chemical equation. |
| Answer» ROASTING : Roasting is the process in which a sulphide ore is strongly heated in the presence of air to convert it into metal oxide. EXAMPLE : 2 ZnS + 3 O₂--->2 ZnO + 2 SO₂.CALCINATION : Calcination is the process in which a carbonate ore is heated strongly in the absence of air to convert it into metal oxide. EXAMPLE : ZnCO₃---->ZnO + CO₂. | |