Extraction of copper is done using copper pyrites. After roasting, the ore is mixed with silica and coke and then smelted in a blast furnace. The matte obtained from the blast furnace is charged into a silica-lined converter. Some silica is also added, and a hot air blast is blown into the mixture to obtain blister copper, which is purified by electrorefining. The chemical formula of copper pyrites is.A. `CuFeS_(2)`B. `Cu_(2)S`C. `Cu_(2)O`D. `CuCO_(3).Cu(OH)_(2)`

Extraction of copper is done using copper pyrites. After roasting, the

1.	Extraction of copper is done using copper pyrites. After roasting, the ore is mixed with silica and coke and then smelted in a blast furnace. The matte obtained from the blast furnace is charged into a silica-lined converter. Some silica is also added, and a hot air blast is blown into the mixture to obtain blister copper, which is purified by electrorefining. The chemical formula of copper pyrites is.A. `CuFeS_(2)`B. `Cu_(2)S`C. `Cu_(2)O`D. `CuCO_(3).Cu(OH)_(2)`
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