An ore on being heated in air forms sulphurous anhydrate. Write the process used for the concentration of this ore.

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Solution

The process used for the concentration of the ore is the froth floatation process. Froth floatation process is used for the concentration of 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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