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Extraction of Aluminium

Anodic produc...

Question

Anodic product in the electrolytic reduction of alumina:

C O_{2}, O_{2}

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O_{2}

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F_{2}

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O_{2}, F_{2}

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Solution

The correct option is B $O_{2}$
Ionization of Alumina in Electrolytic refining.
$2 A l_{2} O_{3} ⟶ 6 O^{- 2} + A l^{3 +}$
Reaction at cathode
$4 A l^{3 +} + 12 e^{-} ⟶ 4 A l$
Reaction at anode
$6 O^{- 2} ⟶ 3 O_{2} + 12 e^{-}$
$O_{2}$ is released at anode.

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