In the extraction of aluminium by Hall-Heroult process purified `AI_(2)O_(3)` is mixed with `CaF_(2)` to

In the extraction of aluminium by Hall-Heroult process purified Al_(2)O_(3) is mixed with CaF_(2) to

In the extraction of aluminium by Hall-Heroult process, purified Al_2O_3 is mixed with CaF_2 to

Hall-Heroult's process is given by :

Hall-Heroult's process is given by :

The graphite electrodes in the extraction of ‘aluminium’ by Hall-Heroult process need to be changed frequently. Why

Assertion : In the metallury of aluminium , purified Al_(2)O_(3) is mixed with Na_(3)AlF_(6) or CaF_(2) . Reason : Na_(3)AlF_(6) or CaF_(2) lowers the melting point of mixture and increases its conductivity.