On immersing an iron nail in CuS04 solution for few minutes, you will observe
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
Answer:D
On immersing an iron nail in CuS04 solution for few minutes, you will observe
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