Apparent molal volumes (Vɸ) and viscosity B-coefficients of NH4X, (C3H7)4NX, (C4H9)4NX (X=[Cr(NCS)4(NH3)2]-) Bu4NClO4 and Bu4NBPh4 were determined from measured solution density () and viscosity (η) in Nitromethane (NM) and Dimethyl Sulphoxide (DMSO) at 298.15 K, 308.15 K and 318.15 K at various electrolyte concentrations. The apparent molal volumes were evaluated by Masson equation and were interpreted in terms of ion-solvent and ion-ion interactions. The viscosity data was analyzed by Jones-Dole equation to evaluate viscosity A and B coefficients. The derived parameters were split into the ionic contributions using which viscosity B± coefficients of various ions were evaluated and interpreted in terms of ion-solvent and ion-ion interactions respectively. The A coefficients were in reasonably good agreement with the limiting theoretical values (A) calculated using Falkenhagen-Vernon equation. Viscosity B± coefficients confirm the existence of some interactions of the chromium complex and ClO4 - ion with both NM and DMSO.