(a)[4]
Apply the kinetic particle model to describe how the particles in sulfur are arranged and how they move when sulfur is a gas and when it is a solid.
(b)[2]
Balance this chemical equation for the reaction: $\text{Cu} + \ldots\text{H}_2\text{SO}_4 \rightarrow \text{CuSO}_4 + \text{SO}_2 + \ldots\text{H}_2\text{O}$.
(c)[2]
Describe a test for chloride ions. State both the test and the result.
(d(i))[2]
On the diagram label the cathode and the electrolyte.
(d(ii))[2]
Predict the products formed in this electrolysis at the positive electrode and the negative electrode.
(d(iii))[1]
Give one observation seen at the positive electrode.