Differential cross sections for elastic scattering of electrons from Trifluoromethane and 1,1 Difluoroethy-lene have been measured in the energy range 30–500 eV using a crossed-beam, high resolution electronspectrometer. The measured cross sections have been put on an absolute scale using the relative flowtechnique. The differential cross sections were extrapolated to zero and 180◦ in the forward and backwardangles respectively using tenth order Legendre polynomials. The total and momentum transfer cross sec-tions have been determined by integrating the differential cross sections over all angles. A theoreticalcalculation using independent atom model with static, exchange and polarization potentials is presented.The measured cross sections are compared with theoretical and other experimental data wherever avail-able. It is seen that the theoretical calculation based on the independent atom model agrees well with ourexperimental data at high energies while at low and intermediate energies the model proves inadequate.