Which metal cannot be extracted by the smelti | vedclass

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(D) Smelting is a process of reduction of a metal oxide with carbon at high temperatures. $Aluminium$ cannot be extracted by smelting because it has a

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Aluminium

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(D) Smelting is a process of reduction of a metal oxide with carbon at high temperatures. $Aluminium$ cannot be extracted by smelting because it has a very high affinity for oxygen. The reduction of $Al_2O_3$ by carbon is not thermodynamically feasible at temperatures achievable in a blast furnace. Therefore,$Aluminium$ is extracted by the electrolytic reduction of fused alumina $(Al_2O_3)$ in the presence of cryolite $(Na_3AlF_6)$.

Which metal cannot be extracted by the smelting process?

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