Copper is the most noble of the first row transition metals and occurs in small deposits…
Chemistry · JEE Advanced · NTA Exams — General Principles and Processes of Isolation of Elements
Copper is the most noble of the first row transition metals and occurs in small deposits in several countries. Ores of copper include chalcanthite (CuSO4.5H2O), atacamite (Cu2Cl(OH)3), cuprite (Cu2O), copper glance (Cu2S) and malachite (Cu2(OH)2CO3). However, 80% of the world copper production comes from the ore chalcopyrite (CuFeS2). The extraction of copper from chalcopyrite involves partial roasting, removal of iron and self-reduction.
In self-reduction, the reducing species is
- S
- O2–
- S2–
- SO2
Answer
(C) S 2 –
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