Question

please explain and tell me​

Answer 1

Answer:

Your answer is here:-

Explanation:

The solution is copper sulphate .

The colour of the solution changes to green this is because when the iron nail is immersed in the solution of copper sulphate than iron displaces copper from the solution of copper sulphate (because iron is more reactive than copper). Therefore colour of the solution changes to green.

Hope it helps you.