Speeds of sound u, isentropic compressibilities κS, viscosities η, excess isentropic compressibilities κSE, excess molar volumes VE, viscosity deviations Δη, and excess Gibbs energies of activation ΔG*E of viscous flow have been investigated for six binary mixtures of diethyl malonate, diethyl bromomalonate, and ethyl chloroacetate with tetra- and trichloromethane at 303.15 K. The values of κSE, VE, Δη, and ΔG*E are highly dependent on the type of components involved and the composition curves are unsymmetrical.The results obtained for viscosity of binary mixtures were used to test the semi-empirical relations of Grunberg-Nissan, Tamura-Kurata, Hind-McLaughlin-Ubbelohde, Katti-Chaudhri, McAllister, Heric-Brewer and Auslaender. The experimental speeds of sound have been analyzed in terms of collision factor theory and free length theory of solutions.