O-LevelChemistryAcids, Bases & Salts5070/11 · May/June 2025 · Q401 Mark

Samples of two compounds, P and Q, are tested. The result of each test is shown. Which row shows the identities of the ions present in P and Q?

AK+ and SO42- | Cr3+ and CO32-

BK+ and CO32- | Fe2+ and SO42-

CK+ and CO32- | Cr3+ and SO42-

DLi+ and CO32- | Cr3+ and SO42-

✓ Correct answer

C: K+ and CO32- | Cr3+ and SO42-

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Topic: Acids, Bases & Salts, O-Level Chemistry (syllabus 5070). Multiple choice, 1 mark.
Source: O-Level Chemistry, May/June 2025 Paper 1 Variant 1, question 40.

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