Download CBSE Class 12 Chemistry Surface Chemistry Chapter Notes in PDF format. All Revision notes for Class 12 Chemistry have been designed as per the latest syllabus and updated chapters given in your textbook for Chemistry in Class 12. Our teachers have designed these concept notes for the benefit of Class 12 students. You should use these chapter wise notes for revision on daily basis. These study notes can also be used for learning each chapter and its important and difficult topics or revision just before your exams to help you get better scores in upcoming examinations, You can also use Printable notes for Class 12 Chemistry for faster revision of difficult topics and get higher rank. After reading these notes also refer to MCQ questions for Class 12 Chemistry given on studiestoday
Revision Notes for Class 12 Chemistry Unit 05 Surface Chemistry
Class 12 Chemistry students should refer to the following concepts and notes for Unit 05 Surface Chemistry in Class 12. These exam notes for Class 12 Chemistry will be very useful for upcoming class tests and examinations and help you to score good marks
Unit 05 Surface Chemistry Notes Class 12 Chemistry
Chemistry Ch 5
Surface Chemistry
Top Concepts / Key learnings:
1. Adsorption: The accumulation of molecular species at the surface rather than in the bulk of a solid or liquid is termed as adsorption.
2. Adsorbate: The substance which is being adsorbed on the surface of another substance is called adsorbate.
3. Adsorbent: The substance present in bulk, on the surface of which adsorption is taking place is called adsorbent.
4. Desorption: The process of removing an adsorbed substance from a surface on which it is adsorbed is called desorption.
5. Absorption: It is the phenomenon in which a substance is uniformly distributed all over the surface.
6. Difference between adsorption and absorption:
7. Sorption: When adsorption and absorption take place simultaneously, it is called sorption.
8. Enthalpy or heat of adsorption: Adsorption generally occurs with release in energy, i.e., it is exothermic in nature. The enthalpy change for the adsorption of one mole of an adsorbate on the surface of adsorbent is called enthalpy or heat of adsorption.
9. Types of adsorption:
a. Physical adsorption or physisorption: If the adsorbate is held on a surface of adsorbent by weak van der Waals’ forces, the adsorption is called physical adsorption or physisorption.
b. Chemical adsorption or chemisorption: If the forces holding the adsorbate are as strong as in chemical bonds, the adsorption process is known as chemical adsorption of chemisorption.
10. Difference between Physical and chemical adsorption:
11. Factors affecting adsorption of gases on solids:
a. Nature of adsorbate: Physical adsorption is non-specific in nature and therefore every gas gets adsorbed on the surface of any solid to a lesser or greater extent. However, easily liquefiable gases like NH3. HCl, CO2, etc. which have higher critical temperatures are absorbed to greater extent whereas H2, O2, N2 etc. are adsorbed to lesser extent. The chemical adsorption being highly specific, therefore, a gas gets adsorbed.
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CBSE Class 12 Chemistry Unit 05 Surface Chemistry Notes
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Notes for Chemistry CBSE Class 12 Unit 05 Surface Chemistry
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Unit 05 Surface Chemistry Notes for Chemistry CBSE Class 12
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Unit 05 Surface Chemistry CBSE Class 12 Chemistry Notes
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Notes for CBSE Chemistry Class 12 Unit 05 Surface Chemistry
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