Nomenclature C l Species concentration D Molecular diffusivity Gr Grashof number of heat transfer K 1 Permeability of the medium k Thermal diffusivity Rc Elastic parameter Nu Nusselt number S Heat source parameter Sh Sherwood number T Non-dimensional temperature t Non-dimensional time u Non-dimensional velocity v o Constant suction velocity y Non-dimensional distance along y-axis Ԑ A small positive constant β Volumetric coefficient of expansion for heat transfer τ Density of the fluid β 1 Volumetric coefficient of expansion with species concentration S o Frequency of oscillation υ Kinematic coefficient of viscosity σ Electrical conductivity ω Non-dimensional frequency of oscillation C Non-dimensional Species concentration Gc Grashof number for mass transfer g Acceleration due to gravity Kp Porosity parameter M Magnetic parameter B 0 Magnetic field of uniform strength

In this manuscript we have studied the laminar convective heat and mass transfer flow of an incompressible, viscous, electrically conducting fluid over a fluid over an impulsively started vertical plate with conduction-radiation embedded in a porous medium in the occurrence of transverse magnetic field. An exact solution is derived by solving the dimensionless main coupled partial differential equations using Laplace transform technique. The properties of important physical parameters on the velocity, temperature, concentration, Skin friction, Sherwood number and Nusselt number have been studied through graphs.