Abstract
An examination is offered to analyse the cross diffusion and convective boundary condition effects on unsteady free convective flow, mass and heat transfers subject to heat generation/absorption, chemical reaction and suction/injection effects. The similarity transformation is used to convert the modelled PDEs into ODEs, which are solved numerically. The skin friction, mass and heat transfers rates as well as the effects of several parameters on temperature, concentration and velocity are examined. The chemical reaction effect is important in concentration field compared to temperature and velocity.