Question

how does the colour how does the colours of solution change when Iron nails are kept in copper sulphate solution

Answer 1

it is becoz the iron nail displaces the copper from the copper sulphate solution...
it happens becoz iron is more reactive than copper...

bhai thnx press kr dena ...brain mat dena chalega

Answer 2

The Color of copper sulphate solution changes from blue to green. Because a displacement reaction has been occurred in which iron nails being reactive displaces copper from copper sulphate solution and turned the solution from blue to green stating that it is FeSO4.
Fe(s) +CuSO4(aq)--> FeSO4(aq)+Cu(s)
Iron Copper sulphate Iron
nails (blue) sulphate(green)