Question

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

• A. Galena
• B. Cassiterite
• C. Magnetite
• D. Zinc blende

Answer 1

Answer: (A), (D)

The correct options are
A Galena
D Zinc blende

Galena ($PbS$) and zinc blende ($ZnS$) are sulphide ores. Cassiterite $Sn{O}_2$ (oxide ore), and Magnetite $F{e}_3{O}_4$ (oxide ore) are not sulphide ore. The froth flotation process is used to concentrate sulphide ores, based on preferential wetting properties with frosting agent and water.

Hence option $A$ and $D$ are correct.