Density, viscosity and ultrasonic velocity in binary mixtures of ethyl acetate and hexane has been calculated at temperature 292 K and frequency 2 MHz. Using experimental values various acoustical parameters such as adiabatic compressibility, intermolecular free length, acoustic impedance, ultrasonic attenuation, available volume, free volume, internal pressure, Gibb’s free energy and enthalpy has been calculated. Theoretical values of ultrasonic velocity has also been computed using various models such as impedance relation, Nomoto’s relation, Junjie’s equation and Van-Deal and Vangeel. To check the validity of theoretical models with experimental values, percentage error has been calculated. Further the chi-square test has also been applied to check the relation between theoretical and experimental data. The non-linear variation in acoustical parameters shows that there is a complex formation and the deviation in experimental values from theoretical models proves the strong molecular interaction in the binary mixture.