Electrolysis of a concentrated aqueous solution of NaCl results in

increase in pH of the solution

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decrease in pH of the solution

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O_{2}

liberation at the cathode

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H_{2}

liberation at the anode

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Solution

The correct option is A increase in pH of the solution
Electrolysis of aqueous NaCl solution is known as chlor alkali process (production of caustic soda $N a O H$ )

$2 N a C l + 2 H_{2} O e l e c t r o l y s i s - ------ \to 2 N a O H + C l_{2} + H_{2}$

Production of NaOH increases the pH
So,correct option is option A

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