Acidified water is electrolysed by using carbon electrodes. What is produced at positive carbon electrode?

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Solution

During electrolysis of acidified water using carbon electrodes, $O^{2 -}$ ions are oxidized at the positive carbon electrode (anode) and thus oxygen gas is liberated at anode.

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Acidified water is electrolysed by using carbon electrodes. What is produced at positive carbon electrode?

During electrolysis of acidified water using carbon electrodes, O2− ions are oxidized at the positive carbon electrode (anode) and thus oxygen gas is liberated at anode.

During electrolysis of acidified water using carbon electrodes, $O^{2 -}$ ions are oxidized at the positive carbon electrode (anode) and thus oxygen gas is liberated at anode.