A-LevelChemistryGroup 179701/12 · May/June 2013 · Q151 Mark

Many modern cars are fitted with halogen lamps. When such lamps are first switched on, a distinct purple colour can be seen. Which species is responsible for this purple colour?

AI₂(s)

BI₂(l)

CI₂(g)

DI⁻(g)

✓ Correct answer

C: I₂(g)

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Topic: Group 17, A-Level Chemistry (syllabus 9701). Multiple choice, 1 mark.
Source: A-Level Chemistry, May/June 2013 Paper 1 Variant 2, question 15.

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