A-LevelChemistryGroup 17Oct/Nov 2009Paper 1 Q141 Mark
Which graph correctly describes a trend found in the halogen group? [X represents a halogen atom.]
AGraph showing bond length in X2 decreasing from Cl2 to I2.
BGraph showing strength of van der Waals' forces increasing from Cl2 to I2.
CGraph showing boiling point of X2 decreasing from Cl2 to I2.
DGraph showing bond energy of HX increasing from HCl to HI.
✓ Correct Answer
The correct answer is B. This question tests the candidate's understanding of group 17 within the Chemistrysyllabus. The examiner's mark scheme requires...
📋 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...
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