(a)[1]
Name the principal ore from which aluminium is obtained.
(b(i))[1]
Label the cathode on Fig. 3.1.
(b(ii))[2]
State the substance formed at each electrode.\n\npositive electrode\n\nnegative electrode
(c)[2]
State two physical properties that explain why aluminium is chosen for overhead electrical cables.
(d(i))[1]
State what the term alkali means.
(d(ii))[2]
Describe how to find the pH of a dilute solution of sodium hydroxide using universal indicator paper.
(d(iii))[2]
State the colour change of the methyl orange.\n\nfrom ................ to ................