When an electric current is passed through an aqueous solution of the following, the concentrations — Electrochemistry Chemistry Question

💡 Solution & Explanation

Electrolysis of an aqueous KNO3 solution strictly involves the reduction of water to H2 at the cathode and the oxidation of water to O2 at the anode. The K^+ and NO3^- ions serve purely as spectator ions to carry the current. Assuming the volume is artificially kept constant, their concentrations will not change. Therefore, correct answer is B.