ΔTf∝i
i for C2H5OH=1, i for Ba3(PO4)2=5, i for Na2SO4=3, i for KCl=2, i for Li3PO4=4
Thus, depression in freezing point will be in order : C2H5OH<KCl<Na2SO4<Li3PO4<Ba3(PO4)2
and freezing point will be in order : Ba3(PO4)2<Li3PO4<Na2SO4<KCl<C2H5OH