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# Aluminium is obtained from ${\text{A}}{{\text{l}}_{\text{2}}}{{\text{O}}_{\text{3}}}$ byA) Thermal reductionB) Hydrometallurgical methodC) Electrolytic reductionD) Reduction by iron

Last updated date: 22nd Mar 2023
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Hint: We need to know that in chemistry, periodic tables play a vital role. In the periodic table totally $118$ elements. In the periodic table totally $18$ columns and $7$ rows. The columns are called as groups. Hence, $18$ groups in the periodic table. The rows are called periods. Hence, the total $7$ period in the table. Aluminium is present in the second period and thirteenth group in the periodic table. The atomic number of aluminium is $13$.

${\text{2A}}{{\text{l}}_{\text{2}}}{{\text{O}}_{\text{3}}}{\text{ + 3C}} \to {\text{4Al + 3C}}{{\text{O}}_{\text{2}}}$
We need to remember that the aluminium be extracted from alumina (${\text{A}}{{\text{l}}_{\text{2}}}{{\text{O}}_{\text{3}}}$) by electrolytic reduction method.
Aluminium is obtained from ${\text{A}}{{\text{l}}_{\text{2}}}{{\text{O}}_{\text{3}}}$ by electrolytic reduction only.
Hence, option A is not correct, Aluminium is obtained from ${\text{A}}{{\text{l}}_{\text{2}}}{{\text{O}}_{\text{3}}}$not by thermal reduction.
Option B is not correct, Aluminium is obtained from ${\text{A}}{{\text{l}}_{\text{2}}}{{\text{O}}_{\text{3}}}$ not by hydrometallurgical method.
Option C is correct, Aluminium is obtained from ${\text{A}}{{\text{l}}_{\text{2}}}{{\text{O}}_{\text{3}}}$ by electrolytic reduction.
Option D is correct, Aluminium is obtained from ${\text{A}}{{\text{l}}_{\text{2}}}{{\text{O}}_{\text{3}}}$ not by reduction by air.