"copper is a red-brown element obtained from copper sulfide ores by heating the ores in air, which forms copper oxide. heating the copper oxide with carbon produces impure copper, which is purified by electrolysis." how many of these, i) color ii) heating with carbon iii) purification by electrolysis
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"copper is a red-brown element obtained from copper sulfide ores by heating the ores in air, which f...
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