Q16Multiple correct
In the extraction of aluminium by Hall-Heroult process, purified Al2O3 is mixed with CaF2 to
- (i)lower the melting point of Al2O3.
- (ii)increase the conductivity of molten mixture.
- (iii)reduce Al3+ into Al(s).
- (iv)acts as catalyst.
Show answer
(i) lower the melting point of Al2O3.
(ii) increase the conductivity of molten mixture.