1.

Differentiate between roasting and calcination? Explain the two with the help of suitable chemical equations. How is zinc extracted from its ore?

Answer»

Roasting is the process in which the ore is heated below its melting point in presence of air to oxidise the impurities. eg: carbon, sulphur etc removed as their gaseous oxides.

Calcination is the process of heating the ore below its melting point an absence of air to remove volatile impurities like arsenic etc



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