Froth flotation method is used for the concentration of :

oxide ores

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sulphide ores

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sulphate ores

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halide ores

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Solution

The correct option is B sulphide ores
Froth floatation is based on the principle of the difference in the wetting properties of the ore and gangue particles with the water and oil. This method is used for those metals whose ore gets preferably wet by the oil and the gangue by the water. The sulphide ores get preferably wet by the oil and the gangue with the water.

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An ore is concentrated by froth flotation method. That concentrated ore will be converted to its oxide form by ___ process.

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