Why does the reaction of between copper sulfate + iron happen?
Because Iron is more reactive than copper, soit "kicks"/replacecopperaway to formironsulfate.
What will happen if we place a copper mail into an iron sulphate solution?
Noreaction, because ironismore reactive than copper
Thermite reaction:
Aluminium + iron oxide -> aluminium oxide + iron
It is a very exothermic reaction that produces molten. This technique is used to weld rails together.
Metal extraction using carbon:
Coke (pure carbon) is added with iron ore (iron oxide) and heated in a high tempurtature to produce molten iron. This technique can also be used to extract iron, zinc, tin and lead.