Question

what is disadvantages of using the plating of less reactives metal or more reactive metal​

Answer 1

Explanation:

Here, we witness iron and copper competing to be compounds in solution. Iron wins as it displaces copper from copper sulphate solution. Green iron II sulphate is formed.

Other metals displace less reactive metals in a similar manner.

A compound will always displace a less reactive metal from solutions of its compounds.

Another example of 'competition' between metals to form compounds is observed in the reaction between metals and metal oxides.

Observe the reaction between iron and copper oxide, mixed and heated strongly.