According to freundlich adsorption isotherm, which of the following is correct?

Options

A. `(x//m)propp^(@)`
B. `(x//m)prop p^(1)`
C. `(x//m)prop p^(1//n)`
D. All the above are correct for different ranges of pressure

Answer

D

Explanation

Freundlich adsorption isotherm is generally represented as (x/m) = `kp^(1//n)` with n `gt` 1, However, this is valid for the limited range of pressure. At low pressure, x/m is generally vary linearly with pressure. Hence, (x / m) `prop` p. At high pressure, (x/m) attains a constant value. Hence, (x/m)`prop P^(@)` .In between these two ranges (x/m) does not increase as fast as pressure. Hence (x/m) `prop p^(1//n)` with n `gt` 1. Thus all . the three choices are correct at different ranges ofpressure.