On heating Hydrated Copper Sulphate, it turns ______ colour.

Hydrated copper sulphate, on heating, changes from blue to white and the crystalline form changes to amorphous (powder). The chemical reaction is given by

CuSO₄.5H2O → CuSO₄ + 5H₂O(g)

The colour change is due to the escaping of water molecules on heating, and copper sulfate pentathlete is converted to anhydrous copper sulfate.