Name 3 sulphide ores. [3 MARKS]
Ores : 1 Mark each Galena, lead ore (PbS) Zinc Blende, Zinc ore (ZnS) Cinnabar, Mercury ore (HgS)
Write down the formulae of
(i) Sodium oxide
(ii) Aluminium chloride
(iii) Sodium sulphide [3 MARKS]