Q.

Heating of ore in presence of air to remove impurity of sulphur is called

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a

Calcination

b

Roasting

c

Smelting

d

None of these

answer is B.

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Detailed Solution

Roasting involves heating of the ore either alone or with some other material usually in presence of air below its fusion temperature. In roasting , definite chemical changes like oxidation , chlorination etc., take placeS+O2→SO2 (oxidation)
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