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

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

1) Magnetite 

2) Galena 

3) Cassiterite 

4) Malachite

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2) Galena

Froth floatation method is used for the concentration of sulphide ores. 

The formulae of the given ores are:

Magnetite – Fe3 O4 

Galena PbS 

Malachite — CuCO3 .Cu (OH)2

Out of these ores, only Galena is a sulphide ore.

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