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Smelting of aluminium ore (bauxite) involves the extraction of aluminium through the process of:

Option: 1


Option: 2


Option: 3



Option: 4


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The smelting of aluminium ore, which is primarily composed of bauxite, involves the extraction of aluminium through the process of electrolysis.

Electrolysis:  the electrolytic is reduction of alumina to extract pure aluminium. The alumina is dissolved in molten cryolite \mathrm{\left(N a_3 A l F_6\right)} bath, which lowers the melting point of alumina and allows it to conduct electricity. The bath is contained within a specialized cell called an electrolytic cell.

In the electrolytic cell, a direct current (DC) is passed through the molten cryolite-alumina mixture. The aluminium oxide \left(\mathrm{Al}_2 \mathrm{O}_3\right) is broken down into its constituent elements: aluminium \mathrm{(Al)} and oxygen \mathrm{(O)}. The oxygen combines with the carbon anodes in the cell to form carbon dioxide \left(\mathrm{CO}_2\right). The aluminium ions are attracted to the cathode (negative electrode) and are deposited as molten aluminium metal.

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Deependra Verma

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