Freundlich adsorption isotherm is given by the expression x/m=kp1/n which of the following conclusions can be drawn from this expression.
(i) When 1/n = 0, the adsorption is independent of pressure.
(ii) When 1/n = 0, the adsorption is directly proportional to pressure.
(iii) When n = 0, x/m vs p graph is a line parallel to x-axis.
(iv) When n = 0, plot of x/m vs p is a curve.