Chemistry - Metallurgy Question with Solution | TestHub

(A) $2\mathrm{Na}{\left[\mathrm{Al}(\mathrm{OH}{)}_4\right]}_{(\text{aq. })}+{\mathrm{CO}}_2⟶{\mathrm{Na}}_2{\mathrm{CO}}_3+{\mathrm{H}}_2\mathrm{O}+2\mathrm{Al}(\mathrm{OH}{)}_3(\downarrow )$

or

${\mathrm{Al}}_2{\mathrm{O}}_3\cdot 2{\mathrm{H}}_2\mathrm{O}(\mathrm{ppt})$

(B) Function of ${\mathrm{Na}}_3{\mathrm{AlF}}_6$ is to lower the melting point of electrolyte.

(C) During electrolysis of ${\mathrm{Al}}_2{\mathrm{O}}_3$, the reactions at anode are :

(D) The steel vessel with a lining of carbon acts as cathode.