Law of reciprocal proportion is not obeyed by :(A) P2O3, PH3, H2O (B) SO3, SO2, O2(C) KCl, Cl2O, K2O (D) H2S, SO2, H2O Share with your friends Share 1 Kumar Sarang answered this Law of Reciprocal proportion is not obeyed by SO3,SO2,O2 . -6 View Full Answer