Question

justifii with the help of an example that displacement reaction is also a redox reaction.

Answer 1

Consider the following displacement reaction in which Fe displaces Cu from CuSO4 to form FeSO4:

Fe(s) +              CuSO4(aq) ---->       FeSO4(aq) +   Cu(s)
Iron          Copper sulphate     Iron (ll)  sulphate      Copper
(Blue)                                         (Green)                  (Reddish-brown)
In the above reaction, Fe is gaining oxygen.Hence, Fe is oxidised. CuSO4 is loosing oxygen.
Hence, it is reduced. So, it is a redox reaction.