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

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

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Solution:

Froth floatation method is mainly applicable for sulphide ores.
(A) Malachite ores: $\left(\right.Cu\left(\right.OH\left(\left.\right)_{2}.CuCO_{3}$
(B) Magnetic ore: $Fe_{3}O_{4}$
(C) Siderite ore: $FeCO_{3}$
(D) Galena ore: PbS (Sulphide ore)

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