Question

In Freundlich adsorption isotherm at moderate pressure, the extent of adsorption (x/m) is directly proportional to P^x. The value of x is:

• A. ∞
• B. zero
• C. 1
• D. 1/n

Answer 1

The correct option is D

1/n

Explanation:

Correct option: D

1. Freundlich isotherm is a relationship between the quantity of a gas absorbed by a solid surface and the pressure of the gas.
2. The equation can be written as$\frac{x}{m}\propto p^{\frac{1}{n}}$ ……… (1) where x is mass of adsorbate, m is mass of adsorbent, p is equilibrium pressure and $\frac{1}{n}$ are the slope.
3. Also, according to question,$\frac{x}{m}\propto p^x$………. (2)
4. On comparing (1) and (2), we get
5. $x=\frac{1}{n}$

The above calculation indicate that option D is correct we have no need to explain incorrect options.

So, the correct option is D.