Question

Why sulphide ore is converted into an oxide for extraction of metals

Answer 1

Sulphide ores are first converted into oxides and then they are reduced to the pure metals through reducing them by carbon or by displacement reactions. This is because converting oxides into pure metals is more easy and cheap than purifying them from sulphide ores.

Answer 2

Sulphide ores are roasted (heating in presence of oxygen) to form their respective oxides and liberating SO2.

This is because metal oxides can be easily reduced to their metals either by heating or treating them with suitable reducing agents.

This is profitable and economical than extracting metals from sulphide ores.

Thus sulphide ores are converted to oxide ores.



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