Identify the correct statement with reference to the extractive metallurgy of aluminium.

Question: 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.

[B].

Approximately 80% of the aluminium deposited on the cathode comes from cryolite.

[C].

Sodium is deposited along with aluminium, but is immediately vaporised.

[D].

Anode effect sets in when the cryolite concentration goes below 40%.

Answer: Option A

Explanation:

No answer description available for this question.