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EEJ MAIN Chemistry QUESTION #7166
Question 1
In the Freundlich adsorption isotherm, which of the following is true for a linear plot of $\log(x/m)$ against $\log P$?
  • $1/n$ is the intercept
  • Only $1/n$ acts as the slope✔️
  • $\log(1/n)$ is the intercept
  • Both $k$ and $1/n$ are included in the slope
Correct Answer Explanation
The Freundlich equation is $x/m = kP^{1/n}$. Taking the log on both sides gives:
$\log(x/m) = \log k + (1/n)\log P$.
Comparing this to the straight-line equation $y = mx + c$:
  • $y = \log(x/m)$
  • $x = \log P$
  • Slope ($m$) = $1/n$
  • Intercept ($c$) = $\log k$