Medium
Cryolite is .........
- A$Na_3AlF_6$ and is used to decrease the electrical conductivity in the electrolysis of alumina.
- B$Na_3AlF_6$ and is used to decrease the melting point of alumina in the electrolysis of alumina.
- C$Na_3AlF_6$ and is used for the electrolytic refining of alumina.
- D$Na_3AlF_6$ and is used in the electrolysis of alumina.
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