Four ionic half-equations are presented below. 1. $\text{Cu}^{2+}\text{(aq)} + 2e^- \rightarrow \text{Cu(s)}$ 2. $2\text{I}^-\text{(aq)} \rightarrow \text{I}_2\text{(aq)} + 2e^-$ 3. $\text{Fe}^{2+}\text{(aq)} \rightarrow \text{Fe}^{3+}\text{(aq)} + e^-$ 4. $\text{Cl}_2\text{(g)} + 2e^- \rightarrow 2\text{Cl}^-\text{(aq)}$ Which statement is correct?
- AIn equation 1, copper(II) ions are oxidised to copper.
- BIn equation 2, iodide ions are reduced to iodine.
- CIn equation 3, iron(II) ions are oxidised to iron(III) ions.
- DIn equation 4, chlorine is oxidised to chloride ions.