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

Options

A. `(x // m) prop P^@`
B. `(x//m) prop P`
C. `(x//m) prop P`
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)` withn `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, (w/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//a)` with `n gt 1`
Thus all the three choices are correct at different ranges of pressure.