The dielectric and ultrasonic studies are important to provide macroscopic response to the structure of organic liquids  and liquid crystals . High frequency ultrasonic waves are also valuable in the investigation of molecular properties or the matter [3-5]. The ultrasonic technique has been applied in characteristing the physico-chemical behaviour of liquid mixtures . Using both ultrasonic and dielectric techniques, one can qualitatively estimate the contribution of electronic polarizability. London dispersion attractive, exchange repulsive and dipole-dipole interactions. In solution study one can also find solute solvent interaction. In this chapter, concentration dependence of ultrasonic velocity, free volume and molar volume are analysed in the solutions of para-azoxynisole and 1,1 diacetyl ferocene solutes in benzene and carbon tetrachloride solvents. The solid like behaviour of para-azoxy anisole and 1,1'diacetyl ferocene has been obtaine by the knowledge of molar volume and free volume. The electronic polarizability contribution to the molar volume has been found out suing high frequency permittivity. The contributions of London dispersion attractive, exchange repulsive and dipole-dipole interactions are also qualitatively estimated.
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