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Copper is the most noble of the first transition metals and occurs in small deposits in several countries. Ores of copper include chalcanthite `(CuSO_(4).5H_(2)O)`, atacamite `(Cu_(2)Cl(OH)_(3))`, cuprite `(Cu_(2)O)`, copper glance `(Cu_(2)S)` and malachite `(Cu_(2)(OH)_(2)CO_(3))`. Howerver `80%` of the world copper production comes from the ore chalcopyrites `(CuFeS_(2))` the extraction of copper from chalcopyrites involves partial roasting of iron and self reduction. Q. In self reduction the reducing species is .... Select the correct options for blank.A. `Cu^(+)`B. `O^(-2)`C. `S^(-2)`D. `SiO_(2)` |
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Answer» Correct Answer - C::D `2CuFeS_(2)+4O_(2)overset(Delta)toCu_(2)S+2FeO+3SO_(2)` `Cu_(2)S+FeO+SiO_(2)toFeSiO_(3)` (Fusible slag) `+Cu_(2)S` (matte) |
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