Effect of J term in the t-t′-J model on the Fermi surface, density of states and the Drude plasma frequency have been studied. The J term is treated within the uniform bond theory of Affleck and Marston [ Phys. Rev. B39, 11538 (1989)]. Inclusion of the J term succeeds in removing the Brinkman-Rice divergence in the density of states at Fermi energy but fails to obtain an insulating state at zero doping. We have also shown that an exact treatment of the J term does indeed lead to an insulating state at half-filling.