Which of the following ores are concentrated by froth floation?
C. Copper pyrites
Only sulphide ores are concentrated by froth floatation. Galena(PbS) and Copper pyrites(CuFeS2) are sulphide ores while Haematite(Fe2O3) and Magnetite(Fe3O4) are oxides and cannot be concentrated by froth floatation.
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