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The Mineral Cryolite, Na3AlF6, Is Used in the Hall Process

Question 41

Multiple Choice

The mineral cryolite, Na3AlF6, is used in the Hall process for aluminum production as


A) the source of aluminum (the ore) .
B) a chemical reducing agent.
C) a material that forms a slag and thus removes impurities.
D) a solvent for alumina, Al2O3.

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