Which of the following statements about electrolysis reactions is correct?
- AWhen concentrated aqueous sodium chloride is electrolysed, sodium forms at the cathode.
- BWhen concentrated hydrochloric acid is electrolysed, a green gas forms at the cathode.
- CWhen dilute sulfuric acid is electrolysed, a colourless gas forms at both electrodes.
- DWhen molten lead(II) bromide is electrolysed, lead forms at the anode.