Question

Iron nails dipped in a solution of copper
sulphate acquire a reddish-brown copper
colour. This is an example of a _______
change.​

Answer 1

Answer:

When iron nails are dipped in Copper sulphate solution after sometime we see a shiny coating on the iron nails the coating is of reddish brown copper . The colour of copper sulphate fades gradually. In this more reactive iron displaces copper from copper sulphate solution.

Explanation:

Answer 2

it will be a chemical change