Copper is the most noble among the first row transition metals and occurs in small deposits in several countries. Ores of copper include chalcopyrite (CuFeS_(2)), cuprite (Cu_(2)O), copper glance (Cu_(2)S) and malachite [CyCO_(3).Cu(OH)_(2)]. However 80% of the world copper production comes from the ore chalcopyrite(CuFeS_(2)). the extraction of copper from chalcopyrite involves partial roasting , removal of ironand self-reduction. In self-reduction, the reducing species is

Copper is the most noble among the first row transition metals and occ

1.	Copper is the most noble among the first row transition metals and occurs in small deposits in several countries. Ores of copper include chalcopyrite (CuFeS_(2)), cuprite (Cu_(2)O), copper glance (Cu_(2)S) and malachite [CyCO_(3).Cu(OH)_(2)]. However 80% of the world copper production comes from the ore chalcopyrite(CuFeS_(2)). the extraction of copper from chalcopyrite involves partial roasting , removal of ironand self-reduction. In self-reduction, the reducing species is
Answer» S `O^(2-)` `S^(2-)` `SO_(2)` SOLUTION :They get oxidised to `SO_(2)`. Here `S^(2-)` IONS are the REDUCING agent.