The purification method used for mineral Al2O3.2H2O is

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The purification method used for mineral Al₂O₃.2H₂O is

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froth flotation

leaching

liquation

magnetic sparation

answer is B.

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Detailed Solution

Al₂O₃⋅2H₂O is purified by leaching. This process is also called Bayer's process.
Chemical leaching is useful in the concentration of bauxite.
The bauxite ore is soluble in aqueous sodium hydroxide or aqueous sodium carbonate solution. The impurities such as ferric oxide are insoluble.

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