A-LevelChemistryGroup 179701/12 · Oct/Nov 2009 · Q141 Mark

Which graph correctly describes a trend found in the halogen group? [X represents a halogen atom.]

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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

B: Graph showing strength of van der Waals' forces increasing from Cl2 to I2.

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Topic: Group 17, A-Level Chemistry (syllabus 9701). Multiple choice, 1 mark.
Source: A-Level Chemistry, Oct/Nov 2009 Paper 1 Variant 2, question 14.

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