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(B) Chemical leaching (specifically the $Baeyer's$ process) is used for the concentration of bauxite $(Al_2O_3 \cdot 2H_2O)$.$Copper$ $pyrite$ $(CuFeS

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Bauxite

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(B) Chemical leaching (specifically the $Baeyer's$ process) is used for the concentration of bauxite $(Al_2O_3 \cdot 2H_2O)$.$Copper$ $pyrite$ $(CuFeS_2)$ is concentrated by the froth flotation method.$Cassiterite$ $(SnO_2)$ is concentrated by hydraulic separation (gravity separation) because it is heavier than the siliceous gangue.$Galena$ $(PbS)$ is also concentrated by the froth flotation method.

Chemical leaching is useful in the concentration of

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