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 vapourised
D. Anode effect sets in when the cryolite concentration goes below 40%
Answer: Option A
This Question Belongs to Metallurgical Engineering >> Extractive Metallurgy
A. electrolytic reduction of TiCl4
B. calcium reduction of TiCl4
C. magnesium reduction of TiCl4
D. thermal dissociation of TiCl4
A. Both A and R are correct, but R is not the correct reason for A
B. Both A and R are false
C. Both A and R are correct and R is the correct reason for A
D. A is true but R is false
A. Atomic number: 30, Atomic weight: 65.38
B. Density: 7.13 gm/cm3
C. Melting point: 419.5°C, Boiling point: 910°C
D. All are correct
A. P-2, Q-3, R-4, S-1
B. P-4, Q-2, R-3, S-1
C. P-3, Q-4, R-2, S-1
D. P-1, Q-3, R-2, S-4
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