¹Professor and HOD, Dept. of Mathematics, Priyadarsini Institute of Technology, Tirupati, Chittoor Dist.- A.P. (INDIA)
²Research Scholar, Dept. of Mathematics, SKIT, Sri Kalahasthi, Chittoor Dist. AP-517 644 (INDIA)

In this paper, unsteady magnetohydrodynamic free convective flow and mass transfer through viscous incompressible fluid past a heated vertical porous plate immersed in porous medium in the presence of heat source and chemical reaction of the uniform transverse magnetic field, oscillating free stream and heat source when viscous dissipation effect is also taken into account. The velocity, temperature and concentration distributions are derived, discussed numerically and their profiles for various values of physical parameters are shown through graphs. The coefficient of skin-friction, Nusselt number and Sherwood number at the plate are derived, discussed numerically and their numerical values for various values of physical parameters are presented through graphically