Air — Normal
Apply the topic independently and explain your method. No hints during the test.
Includes extension practice
Air pollutants and catalytic converters are covered; photosynthesis chemistry and wider climate mitigation material extend Physical Science content.
Easy, Normal and Difficult describe practice demand; they are not the official Core and Extended tiers.
- igcse-cambridge-cie-0652 2025–2026 · C10.2–C10.3
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