(a)[2]
Explain how a zinc coating stops iron from rusting if the coating becomes scratched.
(b(i))[2]
Describe, using a labelled diagram, the metallic bonding in solid zinc.
(b(ii))[1]
Explain why zinc is a good conductor of electricity.
(c)[2]
Write the ionic equations for the cathode and anode reactions in the electrolysis stage used to extract zinc.
(d)[3]
Show by calculation that hydrochloric acid is present in excess for the reaction: Zn(s) + 2HCl(aq) $\rightarrow$ ZnCl$_2$(aq) + H$_2$(g).