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During electrolysis of aqueous solution of a salt under inert electrodes, pH in the space near one of the electrode is increased. Which of the following salt solution was electrolysed ?

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KCl

CuCl₂

Cu(NO₃)₂

CuSO₄

answer is A.

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Detailed Solution

In KCl, the K⁺ ion is cation that has a lower electrode potential than H⁺. Thus, hydrogen is liberated at cathode and accumulate at one electrode and results in increase of the pH of one electrode.

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