In this paper the unsteady laminar free-convection flow of a viscous incompressible fluid, past exponentially accelerated infinite vertical plate with variable temperature and mass diffusion in the presence of chemical reaction and the magnetic field is considered. The Laplace transform method is used to obtain the expression for skin-friction, Nusselt number and Sherwood number. The effect of velocity profiles are studied for different physical parameters like Prandtl number, thermal Grashof number, mass Grashof number, Schmidt number and time