The densities and viscosities of nicotinium dichromate with DMSO and methanol have been measured at 303.15K. The values are used to calculate the apparent molar volume ( ) Vf , limiting molar volume ( ) 0 Vf , excess molar volume ( E ) m V , viscosity deviation (Dh ) and excess Gibb’s free energy of viscous flow ( ) E DG* . The viscosity results have been computed to calculate Falkenhagen coefficient (A) and Jones-Dole B coefficient. The main aim of the study is to correlate the excess properties with molecular interactions present in the solution. The strength if interaction is related to the nature of solvents.