Question

In the electrolysis of molten Al₂O₃ with inert electrodes.
(a) Al is oxidized at anod to Al³⁺
(b) O₂ gas is produced at anode
(c) O⁻ is reduced at cathode
(d) O is oxidized at anode

Answer 1

the electrolysis of molten Al2O3 dissolved in cryolite , is the Hall- Heroult process for commmercial production of aluminium

According to the reaction, we see O2 gas is produced at anode , hence the answer b

Answer 2

Dear friend,

◆ Answer - (b) O₂ gas is produced at anode
In the electrolysis of molten Al₂O₃ with inert electrodes *O₂ gas is produced at anode*.

● Explanation -
Electrolysis of molten alumina occurs as follows -
2Al2O3(aq) --> 4Al(s) + 3O2(g)

At anode -
6O- --> 3O2 + 6e-
At cathode -
2Al3+ + 6e- --> 2Al

Hope this helps you. Thanks for asking..