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A-LevelChemistryChemical bondingFeb/Mar 2019Paper 2 Q225 Marks

The elements in Group 17 of the Periodic Table are called the halogens. They form stable compounds with both metals and non-metals. The table gives some data about F2, HCl and CaF2. F2 | HCl | CaF2 --- | --- | --- boiling point/K | 85 | 188 | 2773 relative formula mass | 38.0 | 36.5 | 78.1

Q: What topic does this question test?

This question tests Chemical bonding in A-Level Chemistry (syllabus code 9701). It is worth 25 marks.

📋 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 structured question tests Chemical bonding in A-Level Chemistry (syllabus code 9701). It is worth 25 marks.

Source

This question appeared in the Cambridge A-Level Chemistry Feb/Mar 2019 examination, Paper 2 Variant 2.

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