Viscosities at 303.15 K have been measured for binary liquid mixtures of 1,1,2,2-tetra-chloroethane (C2H2C14) withn-hexane,n-heptane,n-octane andn-nonane. The viscosity data have been analysed in the light of absolute reaction rate and free volume theories of liquid viscosity. The values of ηEare negative over the entire composition range. Further, the study has been extended to evaluate interaction parameter,d. The values of both ηEanddindicate the existence of dispersion forces between unlike molecules.