Objects made of iron and steel rust when they are left outside.
Complete the sentence.
Use words from the list: carbon dioxide, nitrogen, oxygen, salt, water
Iron rusts only when both ...... and ...... are present.
Complete the word equation for rusting.
iron + oxygen + water →\rightarrow→ ......
The table shows three steel objects.
| Object | Method used to stop it rusting |
|---|---|
| bicycle chain | ? |
| car body | ? |
| dish-drying rack | ? |
Use words from the list: coating with oil, coating with plastic, painting
Complete the table. Use each method once.
Explain how painting a steel object stops it rusting.
Rust is weak and flakes off the surface of iron.
Explain why a rusty iron gate keeps on rusting until it is completely rusted away.
61 exam-style questions on OCR GCSE Chemistry 6.1 Improving processes and products, covering 6.1.1 Extracting metals industrially and by electrolysis, 6.1.2 Life cycle assessment and recycling, 6.1.3 Biological methods of metal extraction, 6.1.4 The Haber process and the production of fertilisers, 6.1.5 Alloys and their uses, 6.1.6 Corrosion and its prevention, 6.1.7 Comparing and selecting materials, and 6.1.8 Industrial conditions, rate and position of equilibrium. Each one has a worked solution and a mark scheme showing where the marks go.