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प्रश्न
Give reasons for the following observations:
Physisorption decreases with increase in temperature.
Why does physisorption decrease with the increase of temperature?
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उत्तर
Physisorption is exothermic in nature:
\[\ce{\underset{(Adsobent) (Adsobate)}{Solid + Gas}⇌\underset{(Gas adsorbed on solid)}{Gas/Solid + Heat}}\]
In accordance with Le Chatelier’s principle, physisorption decreases with an increase in temperature. Because the equilibrium will shift in the backward direction, gas will be released from the adsorbed surface.
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संबंधित प्रश्न
Write the differences between physisorption and chemisorption with respect to the following:
(i) Specificity
(ii) Temperature dependence
(iii) Reversibility and
(iv) Enthalpy change
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Give reason why a finely divided substance is more effective as an adsorbent.
What are the factors which influence the adsorption of a gas on a solid?
Answer in one sentence:
Name type of adsorption in which vander Waals focres are present.
Answer in one sentence:
Name type of adsorption in which the compound is formed.
Which of the following is an example of physisorption?
Why is it important to have clean surface in surface studies?
Why do physisorption and chemisorption behave differently with rise in temperature?
Assertion: Detergents with low CMC are more economical to use.
Reason: Cleansing action of detergents involves the formation of micelles. These are formed when the concentration of detergents becomes equal to CMC.
Which among the following is a false statement?
Rate of physisorption increase with:-
Chromatography is based on:-
Adsorption play no role in:-
Write three differences between physisorption and chemisorption.
Which of the following statements is incorrect regarding physisorptions?
Which of the following statements is not true about physisorption?
