The gas evolved at anode during the electrolysis of brine is

C l_{2}

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H_{2}

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O_{2}

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HCl

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Solution

The correct option is A $C l_{2}$
During the electrolysis of aqueous sodium chloride solution (brine), the following reaction takes place:

$2 N a C l + 2 H_{2} O \to 2 N a O H + C l_{2} ↑ + H_{2} ↑$

Chlorine gas is evolved at the anode and hydrogen gas at the cathode. Sodium hydroxide solution is formed near the cathode.

Hence, the correct answer is option (a).

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