This question is about alloys.
Which metal is the main constituent of brass? Select one option:
Which two metals are commonly mixed with gold in jewellery alloys? Select two options:
Give two properties of gold alloys that make them suitable for jewellery. Choose from the list:
Table 1 shows information about some alloys of copper.
Table 1
| Copper alloy | Other elements in alloy | Strength | Used in |
|---|---|---|---|
| A-70 | 28.0% zinc, 1.2% tin | medium | plumbing fittings, heat exchangers |
| A-80 | 10.0% aluminium, 4.5% iron | high | landing gear components, heavy machinery |
| A-90 | 30.0% nickel, 1.5% lead | high | marine valves, condenser tubes |
Calculate the mass of copper in 12.0 kg12.0 \text{ kg}12.0 kg of copper alloy A-80. Use Table 1.
Suggest why alloy A-80 is used to make landing gear components. Use Table 1.
Alloys used for residential drinking water pipes must not contain toxic elements. Suggest why alloy A-90 is not used to make residential drinking water pipes. Use Table 1.
18 exam-style questions on AQA GCSE Chemistry 10.3 Using materials, covering 10.3.1 Corrosion and its prevention, 10.3.2 Alloys as useful materials, and 10.3.3 Ceramics, polymers and composites. Each one has a worked solution and a mark scheme showing where the marks go.