Second virial coefficients, viscosity, thermal conductivity and diffusion coefficients of binary gas mixtures have been computed for the MORSE potential in conjunction with a set of combination rules for the unlike interactions. These calculated values are compared with the experimenta l values with a view to derive inferences regarding the adequacy of the recently proposed MORSE potential. On the basis of this detailed comparison of theory and experiment some specific and useful conclusions have been drawn which enable one to understand the relative footing of this potential in reference to the other two realistic potentials, viz. L-J (12-6) and exp-six.