Question

Iron displaces copper from copper sulphate solution, but copper can't displace iron from iron sulphate solution. why?

Answer 1

because copper is less reactive than iron

Answer 2

The metals copper, silver gold and platinum are less reactive than hydrogen and they do not replace hydrogen from water or acid. ... Zinc can displace copper from copper sulphate solution and iron from ferrous sulphate solution. So zinc is more reactive than iron and copper