Chemistrymedium · Past Paper
What is the role of Cryolite (Na3AlF6) in the extraction of Aluminum?
ATo oxidize aluminum
BTo lower the melting point of Alumina
CTo act as a catalyst
DTo remove impurities like silica
✓ Correct Answer: B — To lower the melting point of Alumina
Cryolite is added to Alumina to lower its melting point from 2000°C to about 900°C and increase conductivity.
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