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A-LevelChemistryAtoms, molecules and stoichiometry9701/12 · May/June 2025 · Q51 Mark

'Red lead' is a red pigment with the formula Pb3O4. Every formula unit of 'red lead' is the same. Each formula unit contains three lead ions and four oxide ions. Lead has two different oxidation states in 'red lead'. What are the oxidation states of lead in 'red lead'?

A+1 and +2
B+1 and +3
C+2 and +4
D+2 and +6

✓ Correct answer

C: +2 and +4

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About this question

Topic
Atoms, molecules and stoichiometry, A-Level Chemistry (syllabus 9701). Multiple choice, 1 mark.
Source
A-Level Chemistry, May/June 2025 Paper 1 Variant 2, question 5.

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