Note 55 — Chapter VI · TTHE COMPOUNDS OF NITROGEN WITH HYDROGEN AND OXYGEN

In its oxidising action nitrous anhydride gives nitric oxide, N2O3 = 2NO + O. Thus its analogy to ozone becomes still more marked, because in ozone it is only one-third of the oxygen that acts in oxidising; from O3 there is obtained O, which acts as an oxidiser, and common oxygen O2. In a physical aspect the relation between N2O3 and O3 is revealed in the fact that both substances are of a blue colour when in the liquid state.