A concentrated aqueous solution of sodium chloride is electrolysed with inert electrodes. Which equation represents the reaction taking place at the anode?
- A$2\text{Cl}^- \rightarrow \text{Cl}_2 + 2e^-$
- B$2\text{Cl}^- + 2e^- \rightarrow \text{Cl}_2$
- C$2\text{H}^+ + 2e^- \rightarrow \text{H}_2$
- D$4\text{OH}^- \rightarrow \text{O}_2 + 2\text{H}_2\text{O} + 4e^-$