A) \[C{{u}^{2}}^{+}\left( aq \right)+{{H}_{2}}\left( g \right)\to Cu\left( s \right)+2{{H}^{+}}\left( aq \right)\]
B) \[C{{r}_{2}}{{O}_{3}}+2Al\to A{{l}_{2}}{{O}_{3}}+2\,Cr\]
C) \[2A{{l}_{2}}{{O}_{3}}+3C\to 4Al+3\text{ }C{{O}_{2}}\]
D) \[ZnO+C\xrightarrow{Coke,\,1673\,K}\,\,Zn+CO\]
Correct Answer: C
Solution :
Hall heroult's process it given by\[2A{{l}_{2}}{{O}_{3}}+3C\to 4Al+3\text{ }C{{O}_{2}}\]
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