Question

What will be the reaction if iron reacts with copper sulphate?

Answer 1

change of colour will change from blue to brown of copper sulphate solution
$the- reaction's-equation- will -be$
fe+cuso4--->feso4+cu

Answer 2

Fe+ CuSO4 -> FeSO4 + Cu                                                                                                          Iron displace copper because it is more reactive metal. Hope it helps :)