A-LevelChemistryGroup 17May/June 2025Paper 1 Q171 Mark
Why do the halogens become less volatile as Group 17 is descended?
AThe halogen-halogen bond energy decreases.
BThe halogen-halogen bond energy increases.
CThe number of electrons in each molecule increases.
DThe van der Waals' forces between molecules become weaker.
✓ Correct Answer
The correct answer is C. This question tests the candidate's understanding of group 17 within the Chemistrysyllabus. The examiner's mark scheme requires...
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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...
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