Answer:
The blue colour of copper sulphate disappears and the solution becomes colourless.
Step-by-step explanation:
When zinc granules are kept in copper sulphate solution, the blue colour of copper sulphate disappears and the solution becomes colourless. Zinc is more reactive than copper and hence displaces copper from copper sulphate solution and forms zinc sulphate.
CuSO4 + Zn → ZnSO4 + Cu