Question

The deep blue colour of copper sulphate solution turns into which colour when iron nail is put into it

Answer 1

if we dip iron nail it turns into green colour

Answer 2

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.