which of the following ores are concentrated by froth floatation?
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a
Haematite
b
Galena
c
Copper pyrites
d
Magnetite
answer is B.
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Detailed Solution
Haematite (Fe2O3) and magnetite (Fe3O4) are oxide ores while galena (PbS) and copper pyrites (Cu FeS2 ) are sulphide ores. As we know sulphide ores are extracted by using froth floatation method.