Investigation of the flow behaviour in a lid driven square enclosure has been performed imposing slip boundary conditions at all sidewalls. The slip on the walls is described by prescribing a tangential momentum accommodation coefficient (σ). While the range of Reynolds number (Re) is varied between 20 and 300, the value of σ is taken in the range of 0.01 to 1. Simulations have been carried out using single relaxation time based lattice Boltzmann method (SRT- LBM). To account for the slip, two different methods are used for treatment of boundary conditions, namely tangential momentum accommodation coefficient (TMAC) and modified bounce-back specular reflection (MBSR). While both schemes are comparable in terms of computing requirements, it is observed that the MSBR scheme predicts higher slip velocity on the wall as compared to that of TMAC scheme in lid driven cavity. Results show that the appearance of secondary vortex is affected by the accommodation coefficient. The size of the secondary vortex in the cavity reduces and eventually vanishes as the slip on the wall increases. The threshold accommodation coefficient for disappearance of corner vortex decreases with increasing Reynolds number. With reducing value of σ i.e., as the effect of slip increases, the location of the primary vortex centre shifts towards the centre of the cavity.