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On immersing an iron nail in CuSO4 solution for few minutes, you will observe that (a) no reaction takes place (b) the colour of solution fades away (c) the surface of iron nails acquire a black coating (d) the colour of solution changes to green

On immersing an iron nail in CuSO4 solution for few minutes, you will observe that
(a) no reaction takes place
(b) the colour of solution fades away
(c) the surface of iron nails acquire a black coating
(d) the colour of solution changes to green

Grade:12th pass

1 Answers

Pawan Prajapati
askIITians Faculty 6228 Points
2 months ago
Answer: (b)Fe(s) + CuSO4 (aq) → FeSO4 (aq) + Cu(s) Fe is present above in the reactivity series of metals. Hence, Fe displaces Cu from CuSO4 solution. And the colour of the solution fades away. This is an example of displacement reaction.

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