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