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In this paper, we have considered heat and mass transfer on the MHD free convection flow of second grade fluid through porous medium bounded by an infinite vertical porous rotating plate taking hall current into account. The vertical plate is subjected to the uniform constant suction perpendicular to it and the temperature on the plate varies with time about a non-zero constant mean while the temperature of free stream taken to be constant. The precise solutions for the velocity, temperature and concentration are obtained making use of perturbation technique. The velocity, temperature and concentration is analysed graphically, and computational results for the skin friction, Nusselt number and Sherwood number are also obtained.