A-LevelChemistryGroup 2Oct/Nov 2024Paper 1 Q211 Mark

Which statement comparing magnesium and barium, or their compounds, is correct?

Q: What topic does this question test?

This question tests Group 2 in A-Level Chemistry (syllabus code 9701). It is worth 1 mark.

AMagnesium reacts with dilute hydrochloric acid more rapidly than barium does.

BOne mole of magnesium carbonate gives off a greater amount of gas when it reacts with an excess of dilute hydrochloric acid than one mole of barium carbonate does.

CThe solubility of magnesium sulfate in water is greater than the solubility of barium sulfate in water.

DMagnesium carbonate undergoes thermal decomposition less readily than barium carbonate does.

✓ Correct Answer

The correct answer is C: The solubility of magnesium sulfate in water is greater than the solubility of barium sulfate in water.

📋 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 Group 2 in A-Level Chemistry (syllabus code 9701). It is worth 1 mark.

Source

This question appeared in the Cambridge A-Level Chemistry Oct/Nov 2024 examination, Paper 1 Variant 2.

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