(a)[4]
Complete the electrolysis sentence by choosing words from the list. breakdown, compound, electricity, electroplating, element, gaseous, heat, molten Electrolysis is the ................. of an ionic ................. when ................. or in aqueous solution by the passage of ................. .
(b)[2]
On the diagram, label: • the anode • the cathode • the electrolyte
(c)[1]
Why are graphite electrodes used?
(d)[2]
State the products formed during the electrolysis of molten zinc iodide at: the negative electrode the positive electrode.
(e)[2]
Name the brown substance. Use ideas about halogen reactivity to suggest why this happens.