CIE iGCSE Co-Ordinated Science C9.5 Corrosion of metals Exam Style Questions Paper 1
▶️ Answer/Explanation
Rusting is a chemical reaction between iron, oxygen and water to form hydrated iron(III) oxide.
If either oxygen or water is absent, rusting cannot take place.
Nitrogen plays no part in rusting, so both oxygen and water together are required.
✅ Answer: (A)
If either oxygen or water is absent, rusting cannot take place.
Nitrogen plays no part in rusting, so both oxygen and water together are required.
✅ Answer: (A)