What would you observe on adding zinc granules to freshly prepared ferrous sulphate solution ? Give reason for your answer.

The colour of the solution changes from green to colourless when zinc is added to iron sulphate solution because zinc is more reactive than ferrous, therefore, it displaces ferrous sulphate solution and forms zinc sulphate solution.

The chemical equation is given below:

$Zn+FeSO_{4}\rightarrow ZnSO_{4}+Fe$