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Q.

Which of the following ore is best concentrated by froth flotation method?

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a

Galena

b

Cassiterite

c

Manetite

d

Malachite

answer is A.

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Detailed Solution

Here only Galena is PbS (a sulphide ore). Cassiterite is SnO2 (oxide ore). Magnetite is Fe3O4 (Oxide ore) and Malachite is Cu(OH)2 . CuCO3 (carbonate ore). The froth flotation process is used to concentrate sulphide ores, based on preferential wetting properties with floating agent and water.

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Which of the following ore is best concentrated by froth flotation method?