Chemistry Part-I
Class 12
NCERT
1
Chapter 1: The Solid State
31 questions
2
Chapter 2: Solutions
54 questions
3
Chapter 3: Electrochemistry
28 questions
4
Chapter 4: Chemical Kinetics
40 questions
5
Chapter 5: Surface Chemistry
27 questions
Q1
What do you understand by activation of adsorbent? How is it achieved?
Q2
What role does adsorption play in heterogeneous catalysis?
Q3
Why is adsorption always exothermic?
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Chapter 6: General Principles and Processes of Isolation of Elements
30 questions
7
Chapter 7: The p-Block Elements
62 questions
8
Chapter 8: The d-and f-Block Elements
48 questions
9
Chapter 9: Coordination Compounds
38 questions
Question
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Solving time: 2 mins
What role does adsorption play in heterogeneous catalysis?
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Heterogeneous catalysis usually involves gaseous reactants and solid catalyst. Due to physisorption or chemisorption, the reactant molecules are adsorbed on the surface of the solid catalyst. This increases the reactant concentration on the catalyst surface and the rate of the reaction.
One of the reactant molecule fragments on catalyst surface and produces active sites which increase the rate of the reaction. The product molecules with no affinity for the adsorbent desorb and catalyst surface becomes free for adsorption of other catalyst molecules. This is in accordance with the adsorption theory.
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| Question Text | What role does adsorption play in heterogeneous catalysis? |
| Topic | Surface Chemistry |
| Subject | Chemistry |
| Class | Class 12 |
| Answer Type | Text solution:1 |
| Upvotes | 30 |
