_____ method is used to concentrate cassiterite ore.

Hydraulic separation

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Magnetic separation

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Leaching

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Froth floatation

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Solution

The correct option is B Magnetic separation
Cassiterite consists of non magnetic particles stannic oxide ( ${SnO}_{2}$ ) and magnetic particles ferrous tungstate ( ${FeWO}_{4}$ ).

Ores made up of magnetic and non-magnetic particles can be separated by magnetic separation. In this method, magnetic particles get attracted towards a magnet leaving non-magnetic part.

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