Question

Giving example differentiate between 'roasting' and 'calcination'..???​

Answer 1

Answer:

calcination is done to remove impurities from ores

roasting is done to convert them into oxides

Answer 2

Explanation:

Roasting:

Heating of ores (mainly sulphide ores) in the presence of oxygen to convert them into oxides.

Example: PbS ---∆-----> PbO

Calcination:

Heating of ores below the melting point in the absence of oxygen.

Example: MgCO3.CaCO3 ------∆---> MgO + CaO +CO2

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