In the context of Hall-Heroult process for the extraction of Aluminium, which of the following statement is false?

C O a n d C O_{2}

are produced in this process

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A l_{2} O_{3}

is mixed with

C a F_{2}

which lowers the melting point of the mixture and enhances the conductivity

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A l^{3 +}

is reduced at the cathode to form

A l

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N a_{3} A l F_{6}

serves as the electrolyte

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Solution

The correct option is D $N a_{3} A l F_{6}$ serves as the electrolyte
In this process, carbon being the anode is oxidised to $C O$ and $C O_{2}$

At the cathode, $A l^{3 +}$ from $A l_{2} O_{3}$ is reduced to $A l$

$A l_{2} O_{3}$ is the electrolyte used, which is undergoing the redox process, here, $N a_{3} A l F_{6}$ serves as the solvent.

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Similar questions

A l_{2} O_{3}

C a F_{2}

Which of the following are added to concentrated alumina during the electrolytic reduction of alumina to aluminium by Hall-Heroult process?

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