Study the following reactions and explain the reactivity. Arrange Cu, Fe, Zn and Ag in the increasing order of their reactivity.
(i) `CuSO_(4)+FetoFeSO_(4)+Cu`
(ii) `FeSO_(4)+ZntoZnSO_(4)+Fe`
(iii) `2AgNO_(3)+CutoCu(NO_(3))_(2)+2Ag`

Explanation

The given reactions are displacement reactions where a more reactive metal displaces a less metal from its aqueous solution. Based on the reactions the metals are arranged in decreasing order of their reactivity.
With the help of the above reactions the metals can be arranged in increasing order of their reactivity as follows:
`Ag lt Cu lt Fe lt Zn`.