A mathematical model of MHD micropolar-nanofluid flow deformed by a stretchable surface is presented with a homogeneous–heterogeneous reactions given by isothermal cubic autocatalator kinetics and first order kinetics. We assumed the existence of an induced magnetic field. The basic microrotation flow and heat mass transfer nonlinear equations are solved using the bivariate spectral local linearisation method. An analysis of the accuracy of the method is given using residual errors, and the influence of certain variables on the fluid properties are discussed. The results show, that the concentration distribution is reduced by an increase in the homogeneous reaction parameter while it increases with the Schmidt number. The rate of heat transfer is enhanced by larger values of the Prandtl number and the thermophoresis parameter.