Question

The sulphide ores are generally roasted to oxide for the extraction of metals instead of being directly

• A. reduced
• B. oxidized
• C. both1 and 2
• D. no option

Answer 1

The correct option is A reduced

Carbon is usually used for the reduction of ores and if sulphide ores are used, it will form carbon disulphide which is difficult to get rid off.
Therefore, sulphide ores are first roasted to get metal oxide which are then reduced by carbon to give metal and CO${}_2$ escapes easily into the air.
The sulphide ores are generally roasted to oxide for the extraction of metals instead of being directly reduced.