Experimental densities (), ultrasonic speeds (u), and refractive indices (n(D)) of binary mixtures of dichloromethane (DCM) with acetone (ACT) and dimethylsulfoxide (DMSO) were measured over the whole composition range at T=298.15, 303.15, and 308.15K. From the experimental data, excess molar volume (V-E), deviations in isentropic compressibility (k(s)), deviations in intermolecular free length (L-f), deviations in refractive index (n(D)), and deviations in ultrasonic speed (u) were calculated. Moreover, the Benson-Kiyohara theory was applied to the binary mixtures to obtain the theoretical k(s) values. The COSMO calculations depending on density functional theory were utilized to estimate the sigma-profiles for the DCM, ACT, and DMSO. The interpreted sigma-profile trends were found supportive with the experimental findings. Applicability of different empirical and semi-empirical relations of refractive index data were tested against the measured results, and good agreement has been obtained. The possible results of intermolecular molecular interactions among mixture components were interpreted.