(a(i))[1]
State the name of an aluminium ore.
(a(ii))[1]
Explain why electrolysis is used to obtain aluminium from its purified ore rather than heating it with carbon.
(b(i))[1]
Identify the gas produced.
(b(ii))[3]
Suggest a practical method for investigating the rate of this reaction by collecting the gas produced. You may include a labelled diagram in your answer.
(c)[2]
State one application of aluminium. Give a reason for its use in this application.