In the electrolysis of molten alumina during the manufacture of aluminium:

Options

A. `A1_(2)O_(3)`undegoes dissociation
B. cryolite undergoes dissociation
C. `A1_(2)O_(3)`and cryolite both undergo dissociation
D. Neither of the two undergoes dissociation

Answer

B

Explanation

`{:(Na_(3)A1F_(6),or,3NaF.A1F_(3)):}`
`AiFunderset("Compound") overset("lonic")(hArr)Na^(+)+F^(-),`
`AIF_(3)underset("Compound") overset("lonic")(hArr)AI^(3+)+2F^(-)`.