The element which could be extracted by electrolytic reduction of its oxide dissolved in a high-temperature melt is:

sodium

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magnesium

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fluorine

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aluminium

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Solution

The correct option is D aluminium
Aluminium metal is obtained by the electrolysis of fused alumina.
Here, fused cryolite and fluorspar are added with alumina and mixture melts at 900°C and alumina becomes a good conductor of electricity. Metallic Al is liberated at the cathode.

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