(a)[2]
Name the gas released at the carbon anode. Give one test and observation used to identify it.
(b)[2]
Name the gas released at the carbon cathode. Give a test and observation that can be used to identify it.
(c(i))[1]
Suggest the name of the electrolyte to use in its place.
(c(ii))[2]
Name the gas released at the carbon anode when the replacement electrolyte is used. Give a test and observation that identify it.