(a) Define electrochemical cell.

(b) Aluminium can be prepared commercially by the application of electrolysis. Name the: I. electrolyte used in the process; II. ore from which the electrolyte is obtained; III. electrodes used in the electrolysis.

(ii) Give two reasons why cryolite, NaAl F\(_6\) is added to the electrolyte?

(c)(i) List the two gaseous fuels produced from coke.

(ii) Which of the two gases listed in (c)(i) is a better fuel?

(iii) Give a reason for your answer in (c)(i)

(iv) Write a balanced equation for the production of each gaseous fuel.

(d)(i) For each of the following reactions, state what would be observed when: I. chlorine gas is bubbled through aqueous sodium iodide; II. chlorine gas is passed over heated iron in a hard glass tube; III. aqueous silver trioxonitrate (V) is added to aqueous sodium bromide.

(ii) Write a balanced chemical equation for each of the reactions in (d)(i).