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Fruendlich Isotherm

I, II and III...

Question

I, II and III are three adsorption isotherms at three temperatures $T_{1}$ , $T_{2}$ and $T_{3}$ , where $x$ is the amount of adsorbate adsorbed per $m g$ of the adsorbent.
The temperatures $T_{1}$ , $T_{2}$ and $T_{3}$ are in the order

T_{1} < T_{2} < T_{3}

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T_{1} = T_{2} = T_{3}

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T_{3} < T_{2} < T_{1}

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No specific order

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Solution

The correct option is A $T_{1} < T_{2} < T_{3}$
Adsorption is an exothermic process. As temperature increases, the extent of adsorption decreases.
Extent of adsorption $(\frac{x}{m})$ is minimum at $T_{3}$ and is maximum at $T_{1}$ .

Thus, $T_{1} < T_{2} < T_{3}$

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