State and explain the reactions, if any, of the following metals with a solution of copper sulphate
(a). Gold
(b). Copper
(c). Zinc
(d). Mercury

Explanation

(a). No displacement reaction with gold because gold is less reactive than copper (b) No reaction of copper with copper sulphate solution (c) Zinc displaces copper from copper sulphate solution to form zinc sulphate solution and copper metal because zinc is more reactive than copper (d) No displacement reaction with mercury because mercury is less reactive than copper