A-LevelChemistryStates of matter9701/12 · Feb/Mar 2022 · Q61 Mark

The boiling points of some hydrogen halides are shown. [Figure 6.1] What is the explanation for the trend in boiling point for the hydrogen halides from HCl to HI?

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AThe bond energies of the hydrogen halides increase from HCl to HI.

BThere is an increase in the strength of the intermolecular forces of attraction from HCl to HI.

CThe intermolecular hydrogen bonds become stronger from HCl to HI.

DThere is an increase in the bond polarity from HCl to HI.

✓ Correct answer

B: There is an increase in the strength of the intermolecular forces of attraction from HCl to HI.

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Topic: States of matter, A-Level Chemistry (syllabus 9701). Multiple choice, 1 mark.
Source: A-Level Chemistry, Feb/Mar 2022 Paper 1 Variant 2, question 6.

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