Practise with past papers.
Oxidation and reduction 4 selected past-paper questions. Work at your own pace; explanations appear after submission.
Bring the ideas together.
One mark per question. This untimed practice set selects questions relevant to the current syllabus from an earlier paper; it is not a complete examination.
Try all 14 questionsGo further with the full papers.
The official papers include written responses and additional topics. Use the original marking guide when marking the complete papers.
Questions: © State of Queensland (QCAA) 2025, CC BY 4.0. Selected from the 2025 external assessment, Paper 1. Layout, formula typography and Q17 distractor notation adapted; the cell stimulus is expressed in cell notation. Explanations are by weirdfacts, not the official marking guide. This is a selected-question practice set, not a full or current-year examination. CC BY 4.0 · QCAA copyright