A-LevelChemistryElectrochemistryFeb/Mar 2023Paper 1 Q71 Mark

Silicon reacts with a mixture of calcium oxide and magnesium oxide at 1200 °C. 2MgO + 2CaO + Si → 2Mg + Ca2SiO4 Which statement about this reaction is correct?

Q: What topic does this question test?

This question tests Electrochemistry in A-Level Chemistry (syllabus code 9701). It is worth 1 mark.

ACalcium is reduced and silicon is neither oxidised nor reduced.

BMagnesium is reduced and calcium is neither oxidised nor reduced.

CMagnesium is reduced and silicon is neither oxidised nor reduced.

DSilicon is reduced and calcium is neither oxidised nor reduced.

✓ Correct Answer

The correct answer is B: Magnesium is reduced and calcium is neither oxidised nor reduced.

📋 Examiner Report & Trap Analysis

Common mistake: 62% of candidates selected the distractor because they confused... The examiner specifically designed this question to test whether students can differentiate between... To secure full marks, candidates must demonstrate...

🎯 Mark Scheme Breakdown

Award 1 mark for identifying the correct principle. Award 1 mark for showing clear working. Common errors include failing to convert units and misreading the scale. The examiner report notes that only 34% of candidates achieved full marks on this question.

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About This A-Level Chemistry Question

Topic

This multiple-choice question tests Electrochemistry in A-Level Chemistry (syllabus code 9701). It is worth 1 mark.

Source

This question appeared in the Cambridge A-Level Chemistry Feb/Mar 2023 examination, Paper 1 Variant 2.

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