What happens when:(a) dilute sulphuric acid is poured on a copper plate?(b) iron nails are placed in copper sulphate solution?

Copper does not react with dilute sulphuric acid .it only reacts with concentrated sulphuric acid so no reaction takes place.It is lower in reactivity series than hydrogen

Iron is more reactive so it displays copper from its salt and form iron sulphate and color of the solution changes from Blue to Green and copper solid gets ppt out .

Fe + CuSO4 → FeSO₄ + Cu

Blue Green

copper does not react with dilute sulphuric acid

iron is more reactive than copper so it displays copper from its salt.