Question

The process that involves the removal of sulphur from the ores is

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• A. Leaching
• B. Smelting
• C. Refining
• D. Roasting

Answer 1

The correct option is D Roasting

Removal of sulphur from the ore is done by Roasting.
Roasting: In roasting, the ore is heated in a regular supply of air in a furnace at a temperature below the melting point of the metal. Some of the reactions involving sulphide ores are:
$2ZnS+3O_2\to 2ZnO+2S{O}_{2}2PbS+3O_2\to 2PbO+2S{O}_{2}2C{u}_{2}S+3O_2\to 2C{u}_{2}O+2S{O}_2$
The sulphide ores of copper are heated in reverberatory furnace.