Molten sodium chloride is electrolysed. Which equation shows the reaction taking place at the cathode correctly?
- A$2\text{Cl}^- + 2e^- \rightarrow \text{Cl}_2$
- B$2\text{Cl}^- - 2e^- \rightarrow \text{Cl}_2$
- C$\text{Na}^+ + e^- \rightarrow \text{Na}$
- D$\text{Na}^+ - e^- \rightarrow \text{Na}$