On immersing an iron nail in CUSO4 solution for few minutes, you will observe: [1]
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 CUSO4 solution for few minutes, you will observe: [1]
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