O-LevelChemistryMetals & Reactivity5070/11 · Oct/Nov 2025 · Q221 Mark

Chlorine gas is bubbled into separate samples of aqueous potassium iodide and aqueous potassium bromide. In which solutions is there a colour change?

A✓ ✓

B✓ X

CX ✓

DX X

✓ Correct answer

A: ✓ ✓

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Topic: Metals & Reactivity, O-Level Chemistry (syllabus 5070). Multiple choice, 1 mark.
Source: O-Level Chemistry, Oct/Nov 2025 Paper 1 Variant 1, question 22.

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