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प्रश्न
What is the role of cryolite `(Na_3AIF_6)` in the electrolytic reduction of alumina in Hall’s process?
उत्तर
The role of cryolite in the electrolytic reduction of alumina in Hall's process is :
1. Lowers the fusion temperature from 20500C to 9500C and enhances conductivity.
2. Increases its conductivity since pure alumina is almost a non-conductor of electricity.
3. Cryolite acts as a solvent for the electrolytic mixture.
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