Question

The electrochemical extraction of aluminium from bauxite ore involves ______.

Options

• The reaction of Al₂O₃ with coke (C) at a temperature > 2500°C.

• The neutralization of aluminate solution by passing gas to precipitate hydrated alumina (Al₂O₃ . 3H₂O).

• The dissolution of Al₂O₃ in hot aqueous NaOH.

• The electrolysis of Al₂O₃ mixed with Na₃AIF₆ to give Al and CO₂.

Answer 1

The electrochemical extraction of aluminium from bauxite ore involves the neutralization of aluminate solution by passing gas to precipitate hydrated alumina (Al₂O₃ . 3H₂O) and the electrolysis of Al₂O₃ mixed with Na₃AIF₆ to give Al and CO₂.