Chemistry · Oct / Nov 2025 · Paper 11 · Question 26

The diagrams show two methods in which metal X is used to prevent the rusting of iron. [diagram: block of metal X on iron; coating of metal X on iron] A student suggests that metal X must be less reactive than iron and must have a lower proton number than iron. Which suggestions are correct? | | less reactive | lower proton number | |---|---|---| | A | ✓ | ✓ | | B | ✓ | ✗ | | C | ✗ | ✓ | | D | ✗ | ✗ | key: ✓ = yes, ✗ = no

1. A✓ ✓
2. B✓ ✗
3. C✗ ✓
4. D✗ ✗

As printed in the paper