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An attempt is made to investigate the laminar flow of a viscous, electrically conducting and heat generation/absorbing fluid over a porous plate in slip-flow regime on a continuously vertical permeable surface in the presence of a radiation, a first order homogeneous chemical reaction and variable viscosity. A magnetic field of uniform strength is assumed to be applied transversely to the direction of main flow. The magnetic Reynolds number is assumed to be small so that the induced magnetic field can be neglected. Expression for the velocity, temperature and concentration are obtained. The influences of the various parameter entering the problem namely, Grashof number, Prandtl number, Schmidt number, heat absorption parameter, radiation parameter, variable viscosity, rarefaction parameter and permeability of the porous medium on the velocity and skin friction are demonstrated graphically. These parameters have significant effect on dimensionless velocity and skin friction.
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