Cryolite is

Options

A. `Na_(3)AlF_(6)` and is used in the electrolysis of alumina for lowering the melting point and increasing the conductivity of alumina
B. `Na_(3)AlF_(6)` and is used in the electrolysis of alumina for decreasing electrical conductivity
C. `Na_(3)AlF_(6)` and is used in the electrolytic refining of alumina
D. `Na_3AlF_(6)` and is used in the electrolysis of alumina for lowering the melting point of alumina only

Answer

A

Explanation

Cryolite is `Na_(3)AlF_(6)` and used in the electrolysis of alumina for lowering the fusion temperature from `2050^@ C` to `950^@C` and it increases the conductivity of alumina `Al_(2)O_(3)` in Hall Heroult process.