For Electrolysis of molten ionic compounds, which ion focus answer best supports this Unit 4.4 objective: Predict that a metal forms at the cathode when a molten ionic compound is electrolysed?

The correct option is To allow the ions to move freely - correct ion focus for molten ionic compound.

The correct option is To allow the ions to move freely - correct ion focus for molten ionic compound. To allow the ions to move freely - correct ion focus for molten ionic compound is correct because it directly supports the approved learning objective to predict that a metal forms at the cathode when a molten ionic compound is electrolysed. This ion focus variant asks students to separate molten ionic compound from similar Unit 4.4 chemical-change ideas. The reasoning belongs to Electrolysis of molten ionic compounds within Electrolysis, so it should not be confused with nearby ideas about acids, alkalis, bases, oxidation, reduction, displacement, reactivity, electrolysis, electrodes, ions, pH, or salt preparation unless those are named in the objective. Use the focus term molten ionic compound to keep the answer aligned with AQA GCSE Chemistry 8462 Unit 4.4 Chemical changes. Keep acid, alkali and base distinct; keep oxidation and reduction distinct; do not mix reduction with displacement; keep electrolysis separate from electroplating; distinguish anode from cathode, positive ions from negative ions, oxidation state from ionic charge, and strong acid from concentrated acid. The other options are weaker because they either use the wrong reaction type, wrong ion, wrong electrode, wrong acid-base distinction, vague wording, or the wrong chemical-change context.