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

Hi friend,

Your answer:

1. Iron being more reactive than Copper, it displaces Copper (Cu) from Copper sulphate and hence,its colour changes from blue to green.

2. Zinc being more reactive than Cu, displaces copper in copper sulphate and forms zinc sulphate.

3. Copper being more reactive than silver displaces it from silver nitrate and forms copper nitrate which is blue in colour.

4.Magnesium being more reactive than copper, displace scopper from copper sulphate solution. Hence, the blue colour of the solution disappears. 

Hope it helps!