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Which of the following ores is most suitably concentrated by the froth-flotation process?

1. Galena
2. Cassiterite
3. Magnetite
4. Malachite

Correct answer: Galena

Solution

Froth flotation is used for sulphide ores. Galena (PbS) is a sulphide and is concentrated by froth flotation; magnetite, cassiterite and malachite are oxide/carbonate ores.

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