A student investigated the conductivity and products of electrolysis for three different solutions, X, Y, and Z. Their results are shown in the table below.
| Solution | Solution conducts electricity | Product at cathode | Product at anode |
|---|---|---|---|
| X | yes | zinc | bromine |
| Y | no | none | none |
| Z | yes | hydrogen | oxygen |
Which of X, Y and Z are electrolytes?
Y only
X and Z only
Y and Z only
X, Y and Z
83 exam-style questions on Edexcel GCSE Chemistry 4.2 Electrolytic processes, covering 4.2.1 Electrolytes and the process of electrolysis, 4.2.2 Products of electrolysis using inert electrodes, 4.2.3 Half equations, oxidation and reduction in electrolysis, and 4.2.4 Electrolysis of copper sulfate and purifying copper. Each one has a worked solution and a mark scheme showing where the marks go.