Question

How zinc is extracted from its sulphide (zns) and carbonate ores (znco3)? Give examples with reactions?

Answer 1

Answer:

$zno (s)+ c(s) \: - zn + co2$

Answer 2

Q. How zinc is extracted from its sulphide (zns) and carbonate ores (znco3). Give examples with reactions.

Ans :

• Zinc extracted from its ore zinc sulphide.

The crude zinc sulphide ore is heated strongly in the excess of air. Zinc sulphide is converted into Zinc oxide.This process is known as roasting.

$2ZnS {(s) } + 3O _{2}(g) → 2ZnO (s) + 2SO _{2}(g) \\ \\ Zinc \: \: sulphide \: \: + \: oxygen →\: \: zinc \: \: oxide \: \: + \: sulphur \: \: dioxide \: \:$

• Zinc extracted from it's ore zinc carbonate.

The crude Zinc carbonate ore is heated strongly in limited supply of the air. zinc carbonate is converted into zinc oxide. This process is known as calcination .

$ZnCo _{3}(s) → ZnO _ (s) + CO_{2}(g) \\ \\ Zinc \: \: carbonate → Zinc \: \: oxide + Carbon \: \: dioxide$

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Note :-

The zinc oxide is reduced to zinc by using a reducing agent such as carbon.

$ZnO(s) + C(s) → Zn(s) + CO (g) \\ \\ \: \: Zinc \: \: Oxide + \: \: Carbon → \: \: Zinc + \: \: Carbon \: \: monoxide$

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