Question

What happens when an iron nail is dipped in copper sulphate solution ​

Answer 1

When an iron nail is dipped in copper sulphate solution, a brown coating of copper is formed in the surface of iron and the colour of copper sulphate solution changes from blue to pale green. The reaction shows that iron is more reactive than copper because it displaces copper from the copper sulphate solution.

Answer 2

A brown coating is formed in the surface of iron nail and the colour of copper sulphate solution changes into pale green