Question

The validity of Freundlich isotherm can be verified by plotting:

• A. \(\log \frac{x}{m} \) on y-axis and \(\log p \) on x-axis
• B. \(\frac{x}{m} \) on y-axis and \( p \) on x-axis
• C. \(\log \frac{x}{m} \) on x-axis and \( p \) on y-axis
• D. \(\frac{x}{m} \) on x-axis and \(\log p \) on y-axis

Hint:

Freundlich isotherm is an empirical relation and does not hold at very high pressures.

Answer 1

The Correct Option is A

Step 1: Understanding Freundlich Adsorption Isotherm.
Freundlich’s adsorption isotherm is given by: \[ \frac{x}{m} = k p^{1/n} \] Taking logarithm on both sides, \[ \log \frac{x}{m} = \log k + \frac{1}{n} \log p \] This equation represents a straight line where:
- \( \log \frac{x}{m} \) is on the y-axis
- \( \log p \) is on the x-axis
Thus, the correct answer is option (1).