Ultrasonics is an interesting field of study which makes an effective contribution to many areas of human endeavor. One of two fundamental types of solutpe–solvent intermolecular interactions is the specific interactions, such as hydrogen bonding complexation between solute and solvent. In the present investigation, non-aqueous solution of the selected ionic liquid, 1-benzyl-3-methylimidazolium chloride (bzmimCl) have been prepared with various concentrations and the experiments were carried out to measure ultrasonic velocity, density, viscosity from 5˚C to 55˚C. Using these experimental data, the thermo dynamical parameters and solvation number are studied to reveal the nature and strength of the interactions taking place in the solution. These experimental values have been analyzed and eventually emphasizing the possible molecular interactions. Solute–solvent interactions are conveniently studied by several spectroscopic techniques. They provide information about the structure of the solvent around the solute molecules. Infrared spectroscopy is one of the most powerful analytical techniques which offer the possibility of chemical identification. The results are also compared with FT-IR spectrum
