VISCOMETRIC STUDY OF MOLECULAR-INTERACTIONS IN BINARY-LIQUID MIXTURESOF POLAR AND NONPOLAR-SOLVENTS

Viscosity of polar solute, dichloromethane in a mixture with non polar solvents cyclohexane, benzene, p-xylene and mesitylene have been meas ured at 293.15 K and 303.15 K. The viscosity of binary mixtures prepar ed with cyclohexane show appreciable negative deviation from rectiline ar dependence on mole fraction, this deviation is gradually decreased in case of benzene, p-xylene and mesitylene. An attempt has been made to correlate the deviation of viscosity from the recti-linear dependen ce and parametre 'd' and 'c' values with the degree of interaction. It was found that the value of 'c' parametre obtained by Hind-MC-Laughli n ubbelhode equation containing single constant is more consistant tha n the value of 'd' parametre obtained by Grunberg-Nissan equation.