Ultrasonic velocity, density and viscosity of the ternary mixture of Benzene + Chloroform + Cyclohexane, were measured at 303.15, 308.15 and 313.15 K. The thermodynamical parameters such as adiabatic compressibility ( ), intermolecular free length (Lf), free volume (Vf), internal pressure ( i), acoustic impedance (Z), molar sound velocity (R) and molar compressibility (W) have been obtained from the experimental experimental data for all the mixtures, with a view to investigate the exact nature of molecular interaction. Adiabatic compressibility and intermolecular free length decrease with increase in concentration and temperature. The other parameters shows almost increasing concentration of solutes. These parameters have been further used to interpret the molecular interaction part of the solute and solven in the mixtures.