Make copper sulphate solution in the 100 ml beaker by adding 5-6 grams of copper sulphate in the 50 ml of water. Put the iron nail inside the solution for 2-3 minutes and take it out. You will see that there is copper on the iron nail and also, the color of the solution has change. It shows that the iron has displaced the copper in the solution, which means that the iron is more reactive than copper. Do the same experiment to find the reactivity of other metals too. Zinc in the copper sulphate, Copper in the ferrous sulphate and Zinc in the ferrous sulphate.