The experimental density (ρ), viscosity (η) and velocity (U) have been measured for ternary mixtures of toluene+ cyclohexane + nitrobenzene at temperature 308K. These data were used to determine the adiabatic compressibility, free length, free volume, relaxation time, acoustic impedance and Gibb’s free energy. From the properties of these parameters, the nature and the strength of interactions in the ternary mixture are discussed.