A process employed for the concentration of sulphide ore is:

froth floatation

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gravity separation

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froth separation

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gravity floatation

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Solution

The correct option is A froth floatation
It is a method of separation of ore and gangue by preferential wetting.
Principle of separation is ore ore is preferentially wetted by the oil and hence it floats on the top of the foam and the gangue is preferentially wetted by water and settles down. It is generally applied for sulphide ores.

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