Question: 3 1 5 . Identify the correct statement with reference to the extractive metallurgy of aluminium. The electrolyte consists of molten Na 3 AlF 6

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

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