Question

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

Answer 1

Answer:

It is known as displacement reaction.

Iron is more reactive than copper so it displaces copper from it's salt solution.

Hence the colour of copper sulphate solution change.

Answer 2

Answer:

If the iron nailed is dipped in cropper sulphate solution than iron displace cropper from the sulphate because iron is more reactive ATI than copper.

Hope it helps you