An exact solution of unsteady flow past a parabolic starting motion of the infinite isothermal vertical plate with uniform mass diffusion. in the presence of a homogeneous chemical reaction of the first order. has been studied. The plate temperature and the concentration level near the plate are raised uniformly. https://www.spidertattooz.com/Zenith-El-Primero-36-000-VpH-03-2150-400/