Advertisements
Advertisements
प्रश्न
Discuss the effect of temperature on the adsorption of gases on solids.
Advertisements
उत्तर
Adsorption is generally exothermic; hence, increasing temperature decreases adsorption. In physical adsorption, a rise in temperature weakens van der Waals forces, lowering adsorption. For chemical adsorption, it first increases with temperature due to activation energy requirements, then decreases at higher temperatures as desorption dominates. Thus, the effect of temperature depends on the type of adsorption.
संबंधित प्रश्न
Give reasons for the following observations:
Physisorption decreases with increase in temperature.
Differentiate between adsorbtion and absorption.
Write any two characteristics of chemisorption.
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 compounds is formed when tungsten adsorbs oxygen gas?
Adsorption increases when ____________.
Powdered substances are more effective adsorbents than their crystalline forms because ____________.
Chromatography is based on the principle of ____________.
In physisorption adsorbent does not show specificity for any particular gas because ______.
Why is it important to have clean surface in surface studies?
What is the role of activated charcoal in gas mask used in coal mines?
Chromatography is based on:-
Adsorption play no role in:-
Write three differences between physisorption and chemisorption.
Assertion A : Activated charcoal adsorbs SO2 more efficiently than CH4.
Reason R : Gases with lower critical temperatures are readily adsorbed by activated charcoal.
In light of the above statements, choose the correct answer from the options given below.
