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Question
Which method is used for the purification of blister copper?
Which method is used for the purification of blister copper?
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Solution
The correct option is B Poling
After reduction of ore process, the (blister) copper obtained from its sulphide ore, a compound of copper iron pyrites (CuFeS2), contains some copper sulphide, iron and sulphur. The molten metal is stirred with logs (poles) of green wood. The impurities are removed either as gases or they get oxidized and form scum (slag) over the surface of the molten metal. Blister copper is purified by this method. The reducing gases evolved from the wood prevent the oxidation of copper.
After reduction of ore process, the (blister) copper obtained from its sulphide ore, a compound of copper iron pyrites (CuFeS2), contains some copper sulphide, iron and sulphur. The molten metal is stirred with logs (poles) of green wood. The impurities are removed either as gases or they get oxidized and form scum (slag) over the surface of the molten metal. Blister copper is purified by this method. The reducing gases evolved from the wood prevent the oxidation of copper.
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