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← ScienceWhich risk increases when aluminum oxide forms in molten cryolite?
A)Electrolyte polarization and reduced conductivity✓
B)Decreased alumina solubility within the electrolyte
C)Increased anodic overpotential at the electrode
D)Cathodic passivation halting aluminum deposition
💡 Explanation
Electrolyte polarization and reduced conductivity increase, because interfacial aluminum oxide layers induce an effective resistance via concentration polarization, therefore cell efficiency declines rather than increased alumina solubility or anodic/cathodic reactions.
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