1.

Differentiate roasting and calcination process giving one example of each.

Answer»

Solution :ROASTING : Sulphide ore is strongly heated in the presence of air and is converted into METAL oxide.
`2ZnS + 2O_(2) overset("Heat")rarr 2ZnO + 2SO_(2)uarr`
Calcination : Carbonate ore when heated strongly in the ABSENCE of air is converted into metal oxide.
`ZnCO_(3)overset("Heat")rarr ZnO + CO_(2) uarr`


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