A visible change is observed when a strip of iron is placed in an aqueous solution of
- FeSO4
- ZnSO4
-
CuSO4
- MgSO4
The correct answer is: C
Explanation
The blue color of the copper sulfate solution fades and eventually turns a pale green or greenish blue color. This is because the iron displaces the copper from the copper sulfate solution, forming ferrous sulfate (FeSO4). A visible change is observed when a strip of iron is placed in an aqueous solution of copper sulfate (CuSO4)