The focus of this paper is to study the effects of Dufour and Soret on steady magnetohydrodynamic mixed convection over an infinite vertical plate with a convective boundary condition embedded in a porous medium in the presence of first-order chemical reaction. The boundary layer equations governing the flow are written into a dimensionless form, which are numerically solved by applying an implicit finite-difference scheme. A discussion is provided for the effect of Dufour number ( Du ), Soret number ( Sr ) and Biot number ( Bi ) on the velocity, temperature and concentration profiles. Numerical results for the local skin-friction coefficient, the local Nusselt number and the local Sherwood number are also illustrated graphically for different physical parameters.

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