Aluminium is obtained by the electrolysis of __________ where, __________ lining of electrolytic cell act as ___________ and graphite rod as _____________. The electrolyte used is _____________.
Reaction at ______ : $\mathrm{A}{\mathrm{l}}^{3+}+\_\_\_\_\_\_\to \mathrm{A}\mathrm{l}$
Reaction at ______: ${\mathrm{O}}^{2-}-\_\_\_\_\_\_\to 3\left[\mathrm{O}\right]$