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How is zinc extracted from its ore zinc ...

How is zinc extracted from its ore zinc sulphide or zinc carbonate ?

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The crude zinc suJphide ore is heated strongly in excess of air. Zinc sulphide is converted into zinc oxide. This process is known as roasting.
`underset(" Zinc sulphide ")(2ZnS_((s)))+3O_(2(g))rarrunderset(" Zinc oxde")(2ZnO_((s)))+underset("Sulphur dioxide")(2SO_(2(g)))`
The crude zinc carbonate ore is heated strongly in limited supply of air. Zinc carbonate is converted into zinc oxide. This process is known as calcination.

The zinc oxide is reduced to zinc by using a reducing agent such as carbon.
`underset(" Zinc carbonate ")(ZnCO_(3(s)))rarrunderset(" Zinc oxide")(ZnO_((s)))+underset("Carbon dioxide ")(CO_(2(g)))`
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