Purification of Al by electrolysis method is called:

hall process

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baeyer process

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ostwald process

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hoop's process

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Solution

The correct option is D hoop's process
Aluminium is purified by Hoop's process. A thin plate of pure metal is made as a cathode and impure aluminium acts as an anode in this method.

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During the purification of $C u$ by electrolysis:

A l_{2} O_{3}

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