CBSE Class 12 Chemistry Surface Chemistry Notes and Questions

Read and download the CBSE Class 12 Chemistry Surface Chemistry Notes and Questions for the 2025-26 academic session. We have provided comprehensive Class 12 Chemistry school assignments that have important solved questions and answers for Unit 05 Surface Chemistry. These resources have been carefuly prepared by expert teachers as per the latest NCERT, CBSE, and KVS syllabus guidelines.

Solved Assignment for Class 12 Chemistry Unit 05 Surface Chemistry

Practicing these Class 12 Chemistry problems daily is must to improve your conceptual understanding and score better marks in school examinations. These printable assignments are a perfect assessment tool for Unit 05 Surface Chemistry, covering both basic and advanced level questions to help you get more marks in exams.

Unit 05 Surface Chemistry Class 12 Solved Questions and Answers

 

The branch of the Chemistry wich deals with the study of surface phenomena is called surface Chemistry.
 
POINTS TO BE REMEMBERED: ---
 
1. Adsorption: - The accumulation of molecules species at the surface rather in the bulk of a solid or liquid is termed adsorption.
2. Desorption:-Removal of adsorbate from the surface of adsorbent is known as Desorption.
3. Sorption:-When adsorption and absorption both takes place simultaneously.
4. Type of adsorption: - On the basis of interaction between adsorption and absorption, adsorbate are of two types:
(i) Physical adsorption/physisorption: - When weak vander waal interaction involve between adsorbate and adsorbent.
(ii) Chemical adsorption/chemisortion:-When chemical bonds form between adsorbate and adsorbent.
5. Adsorption isotherm:-The variation in the amount of gas adsorbed by the adsorbent with pressure at constant temperature can be expressed by means of a curve termed as adsorption isotherm.
6. Application of adsorption:-
(a) Removal of colouring matter from solution using animal charcoal.
(b)Chromatographic analysis is based on adsorption.
7. Freundlich adsorption isotherm:-It is a graph which shows relationship between the quality of gas adsorbed by unit mass of solid adsorbent and pressure at a particular temperature.
 
 
CBSE Class 12 Chemistry Surface Chemistry Notes and Questions
Surface Chemistry
 
8 .Factors affecting adsorption:-
 
(i)Surface area: - Adsorption increases with increases of surface area of adsorbent.

(ii)Nature of adsorbate:- Easily liquefiable gases are readily adsorbed.

(iii)Temperature:-Low temperature is favorable for physical adsorption and High temperature for chemisortion.

(iv)Pressure: - Pressure increases, adsorption increases.

9. CATALYSIS:- Substances which alter the rate of chemical reaction and themselves remain chemically and quantitatively unchanged after the reaction are known as catalyst and the phenomenon is known as catalysis.

10. PROMOTERS AND POISONS Promoters are substance that enhance the activity of catalyst while poisons decrease

the activity of catalyst.
 Surface Chemistry

Please refer to more CBSE Class 12 Chemistry Surface Chemistry Notes and Questions

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CBSE Class 12 Chemistry Unit 05 Surface Chemistry Assignment

Access the latest Unit 05 Surface Chemistry assignments designed as per the current CBSE syllabus for Class 12. We have included all question types, including MCQs, short answer questions, and long-form problems relating to Unit 05 Surface Chemistry. You can easily download these assignments in PDF format for free. Our expert teachers have carefully looked at previous year exam patterns and have made sure that these questions help you prepare properly for your upcoming school tests.

Benefits of solving Assignments for Unit 05 Surface Chemistry

Practicing these Class 12 Chemistry assignments has many advantages for you:

  • Better Exam Scores: Regular practice will help you to understand Unit 05 Surface Chemistry properly and  you will be able to answer exam questions correctly.
  • Latest Exam Pattern: All questions are aligned as per the latest CBSE sample papers and marking schemes.
  • Huge Variety of Questions: These Unit 05 Surface Chemistry sets include Case Studies, objective questions, and various descriptive problems with answers.
  • Time Management: Solving these Unit 05 Surface Chemistry test papers daily will improve your speed and accuracy.

How to solve Chemistry Unit 05 Surface Chemistry Assignments effectively?

  1. Read the Chapter First: Start with the NCERT book for Class 12 Chemistry before attempting the assignment.
  2. Self-Assessment: Try solving the Unit 05 Surface Chemistry questions by yourself and then check the solutions provided by us.
  3. Use Supporting Material: Refer to our Revision Notes and Class 12 worksheets if you get stuck on any topic.
  4. Track Mistakes: Maintain a notebook for tricky concepts and revise them using our online MCQ tests.

Best Practices for Class 12 Chemistry Preparation

For the best results, solve one assignment for Unit 05 Surface Chemistry on daily basis. Using a timer while practicing will further improve your problem-solving skills and prepare you for the actual CBSE exam.

Where can I download the latest CBSE Class 12 Chemistry Chapter Unit 05 Surface Chemistry assignments?

You can download free PDF assignments for Class 12 Chemistry Chapter Unit 05 Surface Chemistry from StudiesToday.com. These practice sheets have been updated for the 2025-26 session covering all concepts from latest NCERT textbook.

Do these Chemistry Chapter Unit 05 Surface Chemistry assignments include solved questions?

Yes, our teachers have given solutions for all questions in the Class 12 Chemistry Chapter Unit 05 Surface Chemistry assignments. This will help you to understand step-by-step methodology to get full marks in school tests and exams.

Are the assignments for Class 12 Chemistry Chapter Unit 05 Surface Chemistry based on the 2026 exam pattern?

Yes. These assignments are designed as per the latest CBSE syllabus for 2026. We have included huge variety of question formats such as MCQs, Case-study based questions and important diagram-based problems found in Chapter Unit 05 Surface Chemistry.

How can practicing Chapter Unit 05 Surface Chemistry assignments help in Chemistry preparation?

Practicing topicw wise assignments will help Class 12 students understand every sub-topic of Chapter Unit 05 Surface Chemistry. Daily practice will improve speed, accuracy and answering competency-based questions.

Can I download Chemistry Chapter Unit 05 Surface Chemistry assignments for free on mobile?

Yes, all printable assignments for Class 12 Chemistry Chapter Unit 05 Surface Chemistry are available for free download in mobile-friendly PDF format.