Which one of the following ores is best concentrated by froth floatation method ?

Options

A. Galena
B. Cassiterite
C. Magnetite
D. Malachite

Answer

A

Explanation

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