Question

what happens when an iron nail is placed in a copper sulphate solution?​

Answer 1

Answer:

a displacement reaction takes places in which iron nails become brown and copper sulphate solution turns green

Explanation:

$CuSO_{4} +Fe ------> FeSO_{4} +Cu$

Answer 2

Answer:

Copper is less reactive than zinc. So it cannot displace zinc from its solution.