Identify the products formed at the electrodes and describe the observations made during the electrolysis of: (a) molten lead(II) bromide (b) concentrated aqueous sodium chloride (c) dilute sulfuric acid using inert electrodes made of platinum or carbon/graphite

State the symbol equation for the conversion of sulfur dioxide to sulfur trioxide in the Contact process, (2SO_2(g) + O_2(g) ightleftharpoons 2SO_3(g))