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Why is chemisorption referred to as activated adsorption? - Chemistry

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प्रश्न

Why is chemisorption referred to as activated adsorption?

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उत्तर

Chemisorption involves formation of bond between gaseous molecules/atoms and the solid surface for which high activation energy is required. Thus it is referred to as activated adsorption.

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पाठ 5: Surface Chemistry - Exercises [पृष्ठ ७०]

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एनसीईआरटी एक्झांप्लर Chemistry [English] Class 12
पाठ 5 Surface Chemistry
Exercises | Q III. 39. | पृष्ठ ७०

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


Differentiate between adsorbtion and absorption.


Write any two characteristics of chemisorption.


What is the difference between physisorption and 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 is true about chemisorption?


Which among the following is a property of physisorption?


Powdered substances are more effective adsorbents than their crystalline forms because ____________.


The extent of adsorption increases with the ____________.


The physical adsorption is due to ____________.


Extent of physisorption of a gas increases with ______.


Physical adsorption of a gaseous species may change to chemical adsorption with ______.


In which of the following reactions heterogenous catalysis is involved?

(a) \[\ce{2SO2 (g) + O2 (g) ->[NO(g)] 2SO3 (g)}\]

(b) \[\ce{2SO2 (g) ->[Pt(s)] 2SO3 (g)}\]

(c) \[\ce{N2 (g) + 3H2 (g) ->[Fe(s)] 2NH3 (g)}\]

(d) \[\ce{CH3COOCH3 (l) + H2O (l) ->[HCI(l)] CH3COOH (aq) + CH3OH (aq)}\]


What is the role of activated charcoal in gas mask used in coal mines?


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:-


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