The total number of ore of Cu from the following are ………..
Atacamite, Sphalertie, Ruby copper, Chalcanthite, Fool's gold, Chalcopyrite, Angelsite, Baryte, Chalcocite, Zincite.

Amongst the following, the total number of ores which cannot be concentrated by froth floatation process is ............ Haematite, bauxite, galena, copper pyrites, sphalerite, cassiterite, calmine, argentite, chalcocite.

Amongst the following ores, the total number of oxide ores are: Siderite, Magnetite, Haematite, Malachite, Zincite, Cuprite

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,