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Identify the correct statement with reference to the extractive metallurgy of aluminium. | |
A. | The electrolyte consists of molten Na3AlF6 with approximately 1 to 8% Al2O3. [Correct Answer] |
B. | Approximately 80% of the aluminium deposited on the cathode comes from cryolite. [Wrong Answer] |
C. | Sodium is deposited along with aluminium, but is immediately vaporised. [Wrong Answer] |
D. | Anode effect sets in when the cryolite concentration goes below 40%. [Wrong Answer] |