Question

write the chemical reaction of disappear of blue colour of copper sulphate solution

Answer 1

CuSO4 + Fe => FeSO4 + Cu

CuSO4 = Blue
FeSO4 = Green

OR
CuSO4•5H20 ==Heated ==> CuSO4 +5H20

Blue to colourless

Answer 2

Displacement reaction

The initial blue colour of copper sulphate solution is changed to light green colour of iron sulphate