Give reason why carbonate and sulphide ores are usually converted into oxides during the process of extraction?

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Solution

Carbonate and sulphide ores are usually converted into oxides during the process of extraction because metals can be easily extracted by the reduction of their oxides rather than from their carbonates and sulphides.
Example:
Extraction of zinc: ZnS is converted into ZnO by roasting process.

$2ZnS (s) + 2 O_{2} \to (g) Heat - - \to 2 ZnO(s) + 2 {SO}_{2} (g)$

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Question 12 (d)

Give reason why carbonate and sulphide ores are usually converted into oxides during the process of extraction.

Give the reason for the following:
Carbonate and sulphide ores are usually converted into oxides during the process of extraction of metals.

Give reasons

(a) Platinum, gold and silver are used to make jewellery.

(b) Sodium, potassium and lithium are stored under oil.

(d) Carbonate and sulphide ores are usually converted into oxides during the process of extraction.

Give reasons for:

a) Platinum, gold and silver are used to make jewellery.

b) Sodium, potassium and lithium are stored under oil.

c) Aluminium is a highly reactive metal, yet it is used to make utensils.

d) Carbonate and sulphide ores are usually converted into their oxides during the process of extraction.

e) Copper vessels, when exposed to air, form a greenish coating all around.

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