A solution of `CuSO_(4)` was kept in an iron pot. After a few days, the pot developed some holes in it. How will you account for this?

Explanation

Iron lies above copper in the activity series. Therefore, a chemical reaction had taken place between iron from iron pot and copper sulphate solution. We can also say that iron had displaced copper from `CuSO_(4)` solution.
`Fe_((s))+CuSO_(4(aq))toFeSO_(4(aq))+Cu_((s))`