Question

Why does the colour of copper sulphate solution change when
an iron nail is dipped in it?​

Answer 1

Answer:

because iron displaces copper from its solution as iron is more reactive than copper

Explanation:

Answer 2

Answer:

Heyaa♡♡

As iron is more reactive than copper, when an iron nail is dipped in a copper sulphate solution ,iron displaces copper from its place to form iron sulphate ,which is green in color.

Hence the blue color of copper sulphate changes into green color because of displacement.

Hope it helped you.