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(C) The relation between the extent of adsorption $(x / m)$ and pressure $(p)$ is given by the Freundlich adsorption isotherm.According to this,$\frac

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(C) The relation between the extent of adsorption $(x / m)$ and pressure $(p)$ is given by the Freundlich adsorption isotherm.According to this,$\frac{x}{m} = k p^{1 / n} \quad (n > 1)$where $x$ is the mass of gas adsorbed on mass $m$ of the adsorbent at pressure $p$,and $k$ and $n$ are constants.Taking $\log$ on both sides:$\log (x / m) = \log k + \frac{1}{n} \log p$Comparing this with the equation of a straight line,$y = mx + c$,where $y = \log (x / m)$,$x = \log p$,slope $m = 1 / n$,and intercept $c = \log k$.Thus,the plot of $\log (x / m)$ versus $\log p$ is a straight line with a positive slope,which is represented by graph $(C)$.

The plot that best represents the relationship between the extent of adsorption $(x / m)$ and pressure $(p)$ is

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