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Hall and Heroult Process -
Use to extract aluminum. A fuse mixture of alumina (20%), cryolite (60%) and fluorspar (20%) is electrolyzed using carbon electrodes.
- wherein
Cryolite makes Al2O3 conducting, fluorspar decreases the melting point of alumina
As we have learned that in the Hall -Heroult process,cathode is made up of caarbon
Option 1)
Copper
Option 2)Platinum
Option 3)Carbon
Option 4)Pure aluminium