Look at the table showing the physical properties and costs of four different polymers:
| Polymer | Cost (# per kg) | Tensile strength (MPa) | Melting point (∘C^{\circ}\text{C}∘C) | Maximum useable temperature (∘C^{\circ}\text{C}∘C) |
|---|---|---|---|---|
| W | 1.15 | 28 | 150 | 110 |
| X | 2.40 | 65 | 280 | 220 |
| Y | 1.45 | 45 | 260 | 210 |
| Z | 0.95 | 20 | 135 | 95 |
Which polymer would be the most suitable and cost-effective choice for manufacturing cooking spatulas that must withstand temperatures up to 180∘C180^{\circ}\text{C}180∘C?
48 exam-style questions on OCR GCSE Chemistry Properties of materials. Each one has a worked solution and a mark scheme showing where the marks go.