Question detail
For Electrolysis of molten ionic compounds, which exam wording answer best supports this Unit 4.4 objective: Write word equations for electrolysis of molten ionic compounds?
Try the question, check the answer, then read the explanation to understand the curriculum point.
At a glance
MCQ
Type
practice
Style
Topic
Electrolysis
Question
- A. MgCl₂ + electricity → Mg + Cl₂ - correct exam wording for molten ionic compound
- B. Wrong exam wording: confuses molten ionic compound with a nearby Unit 4.4 chemical change idea
- C. Wrong particle check: uses the wrong ion, electrode, acid-base term, or product for Electrolysis of molten ionic compounds
- D. Wrong reaction link: does not support Write word equations for electrolysis of molten ionic compounds
Answer
The correct option is MgCl₂ + electricity → Mg + Cl₂ - correct exam wording for molten ionic compound.
Explanation
The correct option is MgCl₂ + electricity → Mg + Cl₂ - correct exam wording for molten ionic compound. MgCl₂ + electricity → Mg + Cl₂ - correct exam wording for molten ionic compound is correct because it directly supports the approved learning objective to write word equations for electrolysis of molten ionic compounds. This exam wording 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.
Common mistake
Common Mistake in Writing Word Equations
Students often forget to include the states of the reactants and products in their word equations for electrolysis.
Always specify the physical states of the substances (e.g., solid, liquid, gas) when writing word equations to provide a complete representation of the reaction.
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