Question

Why the Color of Copper Sulphate solution Change when an iron nail is dipped in it?​

Answer 1

Answer:

When an iron nail 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 copper sulphate solution colour changes from blue to pale green.

Answer 2

Answer:

Because iron is more reactive than copper and it displaces copper from its salt solution and forms iron sulphate, which is green in color.