A-LevelChemistryGroup 2May/June 2014Paper 1 Q151 Mark

Which statement about the oxides and hydroxides of the Group II elements Mg, Ca, Sr and Ba 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.

AEach of the oxides reacts readily with water to form a solution of pH 12 or above.

BMagnesium oxide is used as a furnace lining because it has a giant molecular structure and hence a high melting point.

CThe hydroxides are produced directly by the thermal decomposition of the corresponding nitrates.

DThe solubility of the hydroxides increases from Mg(OH)2 to Ba(OH)2.

✓ Correct Answer

The correct answer is D: The solubility of the hydroxides increases from Mg(OH)2 to Ba(OH)2.

📋 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 May/June 2014 examination, Paper 1 Variant 2.

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