Iron (Fe) undergoes various chemical reactions to form different compounds:

Iron (Fe) reacts with chlorine (Cl2) to form iron(II) chloride (FeCl2).Iron(II) chloride (FeCl2) can be further reduced back to iron (Fe).Iron (Fe) can react with sulfuric acid (H2SO4) to form iron(II) sulfate (FeSO4).Iron(II) sulfate (FeSO4) can also be further oxidized to form iron(II) hydroxide (Fe(OH)2).