A-LevelChemistryChemical bondingFeb/Mar 2022Paper 1 Q191 Mark

The table shows the melting points of SiO₂ and P₄O₆. [Figure 19.1] Which statement explains the difference between the melting points of SiO₂ and P₄O₆?

Q: What topic does this question test?

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

AThe bonding of the oxides changes from ionic to covalent.

BThe metallic character of the elements decreases across Period 3.

CThe oxidation number of the element increases from Si to P.

DThe structure changes from giant molecular to simple molecular.

✓ Correct Answer

The correct answer is D: The structure changes from giant molecular to simple molecular.

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

Source

This question appeared in the Cambridge A-Level Chemistry Feb/Mar 2022 examination, Paper 1 Variant 2.

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