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Q.

During extraction of aluminium from bauxite,

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a

molten mixture of aluminium oxide, cryolite and fluorspar is electrolysed

b

impure aluminium is refined by liquation

c

molten aluminium is obtained at cathode while fluorine is liberated at anode.

d

the concentration of ore is done by gravity separation method

answer is B.

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Detailed Solution

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molten mixture of aluminium oxide, cryolite and fluorspar is added to lower melting point and increase the conductivity .

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