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Which among the following statement(s) is(are) true for the extraction of aluminium from bauxite? 

(A) Hydrated Al2O3 precipitates, when CO2 is bubbled through a solution of sodium aluminate. 

(B) Addition of Na3AlF6 lowers the melting point of alumina. 

(C) CO2 is evolved at the anode during electrolysis. 

(D) The cathode is a steel vessel with a lining of carbon

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1 Answer

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Answer: A,B,C,D

(D) The steel vessel with a lining of carbon acts as cathode.

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