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(B) The adsorption of a gas on a solid surface at a constant temperature is described by the Freundlich adsorption isotherm.According to the Freundlic

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$2$

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(B) The adsorption of a gas on a solid surface at a constant temperature is described by the Freundlich adsorption isotherm.According to the Freundlich isotherm,the amount of gas adsorbed $(x)$ per unit mass of adsorbent $(m)$ is given by the relation $\frac{x}{m} = k \cdot p^{1/n}$,where $k$ and $n$ are constants for a given gas and adsorbent at a particular temperature.As the pressure $(p)$ increases,the amount of gas adsorbed $(x/m)$ increases rapidly at low pressures and then approaches a saturation limit at high pressures.Graph $2$ represents this characteristic behavior of the adsorption isotherm,showing a rapid initial increase followed by a plateau as it approaches saturation.

The curve that best describes the adsorption of a gas $(x \, g)$ on $1.0 \, g$ of a solid substrate as a function of pressure $(p)$ at a fixed temperature is

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