Copper is the most noble of the first transition metals and occurs in small deposits in several
Channel: Doubtnut
Date: 26/01/2020

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. Partial roasting of chalcopyrites with silica added to it, produces,