The long-wavelength-limit partial structure factors, Sxy(0), have been determined for liquid silver-indium (Ag-In) alloys using square well potential as perturbation over Percus-Yevick (PY) hard sphere reference system. Obtained Sxy(0) at various compositions of In have been employed to calculate isothermal compressibility and chemical ordering in the alloys. Further, homo-coordination and hetero-coordination in Ag-In alloys have been studied at microscopic level in terms of mutual and intrinsic diffusion coefficients