Question

why is blue solu.of copper sulpate changes to green when a few pieces of iron is added to it??​

Answer 1

because iron is more reactive than copper .when iron added in copper solution so that it change in green colour

Answer 2

$\huge\fbox \red{ \: hola \: }$

It happens because Fe is more reactive then Cu.

It happens because Fe is more reactive then Cu. when Fe is added to the solution of Copper sulphate Fe displaces Cu and solution become Ferrous Sulphate whose colour is Green

$\</em><em>Large\</em><em>f</em><em>b</em><em>o</em><em>x</em><em>\</em><em>mathbb</em><em>\red</em><em>{</em><em>\</em><em>:</em><em> </em><em>thank \: </em><em>u\</em><em>:</em><em>}$