Question

define displacement reaction with the help of an example

Answer 1

Reaction in which highly reactive element displaces low reactive element is called displacement reaction. e.g.. CuSo4+Fe → FeSo4+ Cu

Answer 2

a reaction in which a more reactive metal displaces a less reactive metal is called displacement reaction.
eg: 1.Zn+CuSO4---->ZnSO4+Cu
here zinc displaces copper from copper sulphate solution.
2.Pb+CuCl2--->PbCl2+Cu
here lead displaces copper from copper chloride solution