Poly(vinyl pyrrolidone) (PVP) K-30 sample was subjected to fractionation using ethanol-petroleum ether system as solvent and non solvent, eight fractions were obtained and studied having molecular weight in the range 1.17 x 10(4) to 9.30 x 10(4). The corresponding limiting viscosity numbers of the various fractions were determined and the data relating to the methanolic system conform with the theory. A relation between intrinsic viscosity and weight average molecular weight is derived. The second virial coefficient A2 for different fractions were calculated showing increase with decrease in molecular weight. Although this increase is not very pronounce. It was also concluded that methanol is as good solvent as water for PVP light scattering study.