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:D
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