Chemistry · Oct / Nov 2020 · Paper 11 · Question 9

The circuit diagram shows an experiment using a rod of copper and a rod of graphite. When the switch is closed, the bulb lights because an electric current flows through the copper and the graphite. Which particles move through these two solids?

1. Acopper ions ✓, electrons ✗, carbon ions ✓
2. Bcopper ions ✗, electrons ✓, carbon ions ✗
3. Ccopper ions ✓, electrons ✓, carbon ions ✗
4. Dcopper ions ✗, electrons ✓, carbon ions ✓

As printed in the paper