In this article, we have investigated the two-dimensional MHD steady boundary layer flow of a viscous magneto-micropolar liquid via an extending area. The impact of heat source /sink, and chemical reaction are considered. The governing equations are modeled in Cartesian coordinate system. Using the suitable similarity transformations, the partial differential equations system is changed into the nonlinear ordinary differential equations system. The resulting system of equations is solved through mathematical renowned software Mathematica. The impact of diverse parameters on microrotation, concentration, temperature and velocity are examined via graphs. The present study reveals that, the velocity is arising function of Soret number, Richardson number and Grashof number. It is mentioned that the greater velocity is located in the case of Newtonian liquid as in contrast to the micropolar liquid. In the absence of chemical reaction parameter the velocity is more. It is physically justified that, when the chemical reaction increases in the fluid medium, the velocity of the liquid reduces. It is also found that radiation parameter, chemical reaction parameter and Hartmann number augment the temperature. The current study leads many applications in poro and magneto mechanics.