Question

Q21- On immersing an iron nail in CuSO₄ solution for a few minutes, you will observe A) No reaction takes place B) The color of solution fades away C) The surface of iron nails acquire a black coating D) The color of solution changes to green​

Answer 1

Answer:

Option D is the correct answer.

Explanation:

On immersing an iron nail in CuSO₄ solution for a few minutes, you will observe the color of solution changes to green​.

Following reaction takes place,

CuSO4 + Fe  →  FeSO4 + Cu

This is a displacement reaction. Iron (Fe) displaces copper (Cu) and changes the color of the solution from blue to green.