Q. Froth-flotation method is best used for concentrated of which of the following ore?

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A

Galena

B

Cassiterite

C

Magnetite

D

Malachite

Solution:

Here only Galena is $PbS$ (a sulphide ore). Cassiterite is $SnO_{2}$ (oxide ore). Magnetite is $Fe_{3}O_{4}$ (Oxide ore) and Malachite is $Cu\left(\right.OH\left(\left.\right)_{2}.CuCO_{3}$ (Carbonate ore). The froath floatation process is used to concentrate sulphide ores, based on preferential wetting properties with froating agent and water.

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