Question

why chemical reaction does not takes place when copper is added to iron sulphate solution ​

Answer 1

Answer:

because in the reduction equivalent chart

copper comes below iron

that means iron can redue copper but copper cannot reduce iron from its salt solution

its entirely on the concept of feducing equivalents...

Answer 2

Answer:

copper doesn't react with iron sulphate because it is less reactive than iron.

so it can't replace iron from iron sulphate.

you should have a look on the reactivity series for this.