Question detail

For Extraction of metals and reduction, which exam wording answer best supports this Unit 4.4 objective: Explain why metals more reactive than carbon cannot be extracted from oxides by carbon reduction?

Try the question, check the answer, then read the explanation to understand the curriculum point.

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At a glance

MCQ

Type

practice

Style

Topic

Reactivity of metals

Question

A. They require electrolysis for extraction. - correct exam wording for ore
B. Wrong exam wording: confuses ore with a nearby Unit 4.4 chemical change idea
C. Wrong particle check: uses the wrong ion, electrode, acid-base term, or product for Extraction of metals and reduction
D. Wrong reaction link: does not support Explain why metals more reactive than carbon cannot be extracted from oxides by carbon reduction

Answer

The correct option is They require electrolysis for extraction. - correct exam wording for ore.

Explanation

The correct option is They require electrolysis for extraction. - correct exam wording for ore. They require electrolysis for extraction. - correct exam wording for ore is correct because it directly supports the approved learning objective to explain why metals more reactive than carbon cannot be extracted from oxides by carbon reduction. This exam wording variant asks students to separate ore from similar Unit 4.4 chemical-change ideas. The reasoning belongs to Extraction of metals and reduction within Reactivity of metals, 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 ore 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

Misunderstanding Reactivity and Extraction

Students often think that all metals can be extracted from their ores using carbon, regardless of their reactivity.

Remember that only metals less reactive than carbon can be extracted from their oxides by reduction with carbon. More reactive metals require different extraction methods.

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For Extraction of metals and reduction, which ion focus answer best supports this Unit 4.4 objective: Explain why metals more reactive than carbon cannot be extracted from oxides by carbon reduction?