1.

Copper is the most noble of first row transition metals and occurs in small deposits in several countries. Ores of copper include chalanthrite. (CuSO_(4).5H_(2)O), atacanrite [Cu_(2)Cl(OH)_(3)] cuprite (Cu_(2)O), copper glance (Cu_(2)S) nad malachite [Cu_(2)(OH)_(2)CO_(3)]. However, 80% of the world copper production comes from the ore chalcopyrite (CuFeS_(2)). The extraction of ore chalcopyrite (CuFeS_(2)). The extraction of copper from chalcopyrite involves partial roasting, removal of iron nad selfreduction. In self reduction, hte reducing spent is

Answer»

S
`O^(2-)`
`S^(2-)`
`SiO_(2)`

SOLUTION :N//A


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