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The authors report the structural, electronic and ferromagnetic properties of In2O3 nanoparticles caped with PVP.Different sizes of nanoparticles ranging from 5 to 22nm and bulk were synthesized via solgel chemical process.The structural analyses show that the both caped and uncapped nanoparticles were stabilized in cubic bixbyite.While, x-ray photoemission spectroscopic studies of individual elements like In3p and Ols indicated that nanoparticles are nonstoichiometric having [O]/[In] ratio varied from 1.63 for bulk to 0.86 for 10nm nanoparticle, indicating the surface related defects are systemically increases with decreasing particles size.Only lower sized uncapped particles (<12nm) exhibit room temperature ferromagnetic ordering.The effects of surface defects on the ferromagnetism are interpreted with the theoretical idea of long-range ferromagnetism through defects hybridization at the Fermi level.