During electrolytic reduction of alumina, ___________.

Al is formed at cathode and oxygen is formed at anode

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Al is formed at anode and oxygen is formed at cathode

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Al is formed at cathode and hydrogen is formed at anode

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Al is formed at anode and hydrogen is formed at cathode

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Solution

The correct option is A Al is formed at cathode and oxygen is formed at anode
During electrolytic reduction of alumina, Al is formed at cathode and oxygen is formed at anode.
$⊝$ Cathode: $A l^{3 +} + 3 e^{-} ⟶ A l$
$\oplus$ Anode: $2 O^{2 -} ⟶ O_{2} + 4 e^{-}$

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