The Ultrasonic velocities , density and Viscosityhave been measured for the mixture of P-Xylene in Cumene at temperatures 303K and 308K.The experimental data’s have been used to calculate the acoustical parameters namely molar volume(Vm), adiabatic compressibility(β), free length(Lf), acoustical impedance(Z) and the viscous relaxation time(τ) were evaluated. The obtained results support the occurrence of molecular association through intermolecular hydrohen bonding in this binary liquid mixtures
