• # question_answer Hall-Herolut's process is given by: A) $C{{u}^{2+}}(aq)+{{H}_{2}}(g)\xrightarrow{{}}Cu(s)+2{{H}^{+}}(aq)$ B) $C{{r}_{2}}{{O}_{3}}+2Al\xrightarrow{{}}A{{l}_{2}}{{O}_{3}}+2Cr$ C) $2A{{l}_{2}}{{O}_{3}}+3C\xrightarrow{{}}4Al+3C{{O}_{2}}$ D) $ZnO+C\xrightarrow{Coke,1673k}Zn+CO$

 Hall-Herolut's process is given by: $2A{{l}_{2}}{{O}_{3}}+3C\xrightarrow[{}]{{}}4Al+3C{{O}_{2}}$ $2A{{l}_{2}}{{O}_{3}}(\ell )4A{{l}^{3+}}(\ell )+6{{O}^{2-}}(\ell )$ At cathode: $4A{{l}^{3+}}(\ell )+12{{e}^{-}}\xrightarrow[{}]{{}}4Al(\ell )$ At anode: $6{{O}^{2-}}(\ell )\xrightarrow[{}]{{}}3{{O}_{2}}(g)+12{{e}^{-}}$ $2C+3{{O}_{2}}\xrightarrow[{}]{{}}3C{{O}_{2}}(\uparrow ).$