JEE Advanced 2022 Paper 1

Section: Chemistry

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Question : 47 of 54

Marks: +1, -0

The electrochemical extraction of aluminum from bauxite ore involves.

[JEE Adv 2022 P1]

the reaction of Al2O3 with coke
at a temperature >2500∘C.
the neutralization of aluminate solution by passing CO2 gas to precipitate hydrated alumina (Al2O3⋅3H2O)
(C) the dissolution of Al2O3 in hot aqueous NaOH.
the electrolysis of Al2O3 mixed with Na3AlF6 to give Al and CO2.

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