Question detail

For Electrolysis of molten ionic compounds, which redox focus 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

  1. A. Sodium chloride + electricity → sodium + chlorine - correct redox focus for molten ionic compound
  2. B. Wrong redox focus: confuses molten ionic compound with a nearby Unit 4.4 chemical change idea
  3. C. Wrong particle check: uses the wrong ion, electrode, acid-base term, or product for Electrolysis of molten ionic compounds
  4. D. Wrong reaction link: does not support Write word equations for electrolysis of molten ionic compounds

Answer

The correct option is Sodium chloride + electricity → sodium + chlorine - correct redox focus for molten ionic compound.

Explanation

The correct option is Sodium chloride + electricity → sodium + chlorine - correct redox focus for molten ionic compound. Sodium chloride + electricity → sodium + chlorine - correct redox focus 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 redox 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.

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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