Chemistry - Metallurgy Question with Solution | TestHub

Zinc blende and galena are sulphide ores separated by froth flotation using selective oil-water adjustment, so (A) is correct. Cassiterite (SnO₂) is concentrated by magnetic separation due to magnetic differences, so (B) is correct. Siderite and calamine are carbonate ores, hence (C) is correct. Argentite leaching involves cyanide process with oxygen, so (D) is incorrect.