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  4. The plots of the extent of adsorption (x/m) Vs pressure at different temperature are as follows; <img class=img-fluid question-image alt=Question src=https://cdn.tardigrade.in/q/nta/c-zijwcdvvfpnk.png /> The correct order of increasing temp for curves I, II, III, IV are ;

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Q. The plots of the extent of adsorption (x/m) Vs pressure at different temperature are as follows;

Question



The correct order of increasing temp for curves I, II, III, IV are ;

NTA AbhyasNTA Abhyas 2020Surface Chemistry

Solution:

Physisorption is exothermic in nature. Therefore, in accordance with Le-Chatliers principle, it decreases with increase in temperature. This means physisorption occurs at low temperature more readily. So, The correct order of temperature for curves I, II, III, IV are :

$\text{T}_{4} > \text{T}_{3} > \text{T}_{2} > \text{T}_{1}$