Official Class 12 Chemistry Revision Material: CBSE Class 12 Chemistry Surface Chemistry Chapter Notes
Explore reliable concept summaries and revision materials through the CBSE Class 12 Chemistry Surface Chemistry Chapter Notes. Tailored for Class 12 learners, utilizing these notes for Chemistry Unit 05 Surface Chemistry ensures thorough preparation and strengthens core academic definitions before final evaluations.
Chapter-wise Concept Summaries: Unit 05 Surface Chemistry
Access the complete concept summary PDF for Unit 05 Surface Chemistry below. Regular review of these targeted notes builds familiarity with complex Class 12 Chemistry themes and helps secure higher marks in final school evaluations.
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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Revision Notes and Key Concepts for Class 12 Chemistry Unit 05 Surface Chemistry
Download Chapter Summary: Class 12 Chemistry Unit 05 Surface Chemistry
Review targeted chapter notes for Class 12 Chemistry Unit 05 Surface Chemistry. Built according to official CBSE guidelines, these summaries highlight high-yield topics frequently tested in school evaluations.
Concept Clarification for Unit 05 Surface Chemistry
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You can download the teacher prepared revision notes for CBSE Class 12 Chemistry Surface Chemistry Chapter Notes from StudiesToday.com. These notes are designed as per 2026-27 academic session to help Class 12 students get the best study material for Chemistry.
Yes, our CBSE Class 12 Chemistry Surface Chemistry Chapter Notes include 50% competency-based questions with focus on core logic, keyword definitions, and the practical application of Chemistry principles which is important for getting more marks in 2026 CBSE exams.
Yes, our CBSE Class 12 Chemistry Surface Chemistry Chapter Notes provide a detailed, topic wise breakdown of the chapter. Fundamental definitions, complex numerical formulas and all topics of CBSE syllabus in Class 12 is covered.
These notes for Chemistry are organized into bullet points and easy-to-read charts. By using CBSE Class 12 Chemistry Surface Chemistry Chapter Notes, Class 12 students fast revise formulas, key definitions before the exams.
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