Which of the following ions predominantly moves towards the anode during the electrolysis of fused ( — Electrochemistry Chemistry Question

💡 Solution & Explanation

Fused $NaOH$ contains only $Na^+$ cations and $OH^-$ anions. During electrolysis, the negatively charged $OH^-$ ions migrate towards the positive electrode (anode) where they undergo oxidation to form water and oxygen gas ($4OH^- \rightarrow 2H_2O + O_2 + 4e^-$). The $Na^+$ ions migrate to the cathode to form sodium metal.