Question

Give Reason:-
1.Blue colour turns green when iron fillings are added to CuSO4 solution
2.Reddish Brown ppt appears whenZn granules are added to blue vitriol
3.Blue solutions when metallic copper is added to cloudless silver nitrate
4.Blue colour disappears when Mg is added to copper sulphate solution

Answer 1

1 - blue color turn green because of occurrence of displacement reaction . CuSO4 + Fe = FeSO4 + Cu