Question

why does the colour of copper sulphate solution changed when an iron nail is dipped in it ?​

Answer 1

Answer:

When an iron nail immersed in thesolution of copper sulphate than irondisplaces copper from the solution ofcopper sulphate because iron is more reactive than copper. Therefore copper sulphate solution colour changes from blue to pale green.

Answer 2

Answer:

When an iron nail is dipped in the copper sulphate solution then iron displaces copper from the copper sulphate because it is more reactive than copper. Hence the colour of the copper sulphate solution changes to green.