A study of steady free convective hydromagnetic flow of a reactive viscous fluid in a bounded domain has been analyzed in the present paper. The existence and uniqueness of the solution of momentum and energy equations are proved. By employing the perturbation technique, the momentum and energy equation are solved analytically. Results are presented for velocity and temperature profiles. It is shown that velocity profiles increases as Grashof number, heat source parameter and Prandtl number increases whereas the temperature profile increases as heat source parameter increases.