Department of Chemistry, University of Kalyani, Kalyani-741 235, India Department of Agricultural Chemistry and Soil Science, Bidhan Chandra Krishi Viswavidyalaya, Mohanpur, Kalyani-741 252, India Manuscript received 13 April /999, revised 10 November 1999, accepted 13 January 2000 Adsorption maximum of sulfate is higher in inceptisols followed by alfisols and entisols being higher at low temperature (293 K). Bonding energy constants are of very low values in all the soils. The results also show highest negative ΔGo values in alfisols at 318 K and the lowest in entisols at 293 K. ΔHº and ΔSº changes are higher in alrlsols followed by entisols and inceptisol.