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प्रश्न
Why do physisorption and chemisorption behave differently with rise in temperature?
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उत्तर
Physisorption involves weak van der Waals forces which weaken with rise in temperature. The chemisorption involves formation of chemical bond involving activation energy and like any other chemical reaction is favoured by rise in temperature.
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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
Give reasons for the following observations:
Physisorption decreases with increase in temperature.
Write any two characteristics of chemisorption.
Discuss the effect of temperature on the adsorption of gases on solids.
Write one similarity between Physisorption and Chemisorption
Answer in one sentence:
Name type of adsorption in which the compound is formed.
Adsorption increases when ____________.
Powdered substances are more effective adsorbents than their crystalline forms because ____________.
In physisorption, adsorption is generally ____________.
Chromatography is based on the principle of ____________.
The physical adsorption is due to ____________.
Extent of physisorption of a gas increases with ______.
Which of the following is not a favourable condition for physical adsorption?
In physisorption adsorbent does not show specificity for any particular gas because ______.
What is the role of diffusion in heterogenous catalysis?
In physical adsorption, gas molecules are bound on the solid surface by
