Answer :
The ion which should form at the cathode is the positively charged Ag+ ion.
During electrolysis of aqueous AgNO3,
The cations present are Ag+ and H+, while the anions present are NO3- and OH-.
However, on the basis of standard electrode potential, the electrochemical series,
Ag+ is below Hydrogen, H+ ion and as such, the ion which is formed at the cathode is; Ag+
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