(a)[2]
Predict the products formed at the positive electrode (anode) and the negative electrode (cathode) during this electrolysis.
(b(i))[1]
Explain why graphite electrodes are chosen for use in this electrolysis.
(b(ii))[1]
Give one further use of graphite.
(c)[1]
Which substance is responsible for the red-brown colour?
(d)[1]
Describe the observation when an aqueous solution of potassium bromide is mixed with acidified aqueous silver nitrate.
(e)[1]
State one harmful effect of nitrogen dioxide on human health.