Which of the following ores can be concentrated using froth floatation process?

Copper pyrites

Copper pyrites ores (CuFeS₂) can be concentrated using froth floatation process.

Froth Floatation Method

This method is used for removing gangue from sulphide ores. In this process, a suspension of the powdered ore is made with water. Collectors and froth stabilizers are added to it. Collectors (e.g., pine oils, fatty acids, xanthates, etc.) enhance non-wettability of the mineral particles and froth stabilizers (e.g., cresols, aniline) stabilize the froth.