As shown, two electrolysis experiments were performed. The graphite electrodes are numbered 1-4. In one experiment, molten sodium chloride is used, while in the other, concentrated aqueous sodium chloride is used. Which row gives the products formed at the electrodes in these experiments?
- Aelectrode 1: chlorine; electrode 2: hydrogen; electrode 3: chlorine; electrode 4: hydrogen
- Belectrode 1: chlorine; electrode 2: sodium; electrode 3: chlorine; electrode 4: hydrogen
- Celectrode 1: chlorine; electrode 2: sodium; electrode 3: hydrogen; electrode 4: chlorine
- Delectrode 1: sodium; electrode 2: chlorine; electrode 3: sodium; electrode 4: chlorine