Which of the following methods is based on the principle of the difference in the wetting properties of the ore and gangue particles with water and oil?

Magnetic separation

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Froth floatation process

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Hydraulic washing

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None of these

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Solution

The correct option is B Froth floatation process
Principle involved in the froth floatation method is the difference in the wetting properties of the ore and the gangue particles. The sulphide ore particles are preferentially wetted by oil while gangue particles are preferentially wetted by water.

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The principle behind froth floatation method involves the difference in the ________of the ore and the gangue particles.

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