Chemistry · Oct / Nov 2025 · Paper 12 · Question 26

A piece of zinc is attached to a steel car to prevent it from rusting. Which statement is correct?

1. AA piece of copper is more effective than zinc because copper does not rust.
2. BA piece of magnesium is more effective than zinc because magnesium is less reactive than zinc.
3. CThe piece of zinc provides a barrier around the entire steel car.
4. DThe piece of zinc provides sacrificial protection to the steel car.

As printed in the paper