IIT-JEE 2010 · Paper 1, Chemistry question 15

Paragraph for Questions 14 to 16

Copper is the most noble of the first row transition metals and occurs in small deposits in several countries. Ores of copper include chalcanthite ($\ce{CuSO4.5H2O}$), atacamite ($\ce{Cu2Cl(OH)3}$), cuprite ($\ce{Cu2O}$), copper glance ($\ce{Cu2S}$) and malachite ($\ce{Cu2(OH)2CO3}$). However, 80% of the world copper production comes from the ore chalcopyrite ($\ce{CuFeS2}$). The extraction of copper from chalcopyrite involves partial roasting, removal of iron and self-reduction.