If \( \mathrm{Pt} \) is used as cathode in the electrolysis of aqueous \( \mathrm{NaCl} \) solut...

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If \( \mathrm{Pt} \) is used as cathode in the electrolysis of aqueous \( \mathrm{NaCl} \) solution, the ion produced at cathode is :
(a) \( \mathrm{H}^{+} \)
(b) \( \mathrm{Na}^{+} \)
(c) \( \mathrm{OH}^{-} \)
(d) \( \mathrm{Cl}^{-} \)
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