CBSE Class 12 Chemistry Surface Chemistry Question Bank Set A

Access the latest CBSE Class 12 Chemistry Surface Chemistry Question Bank Set A. We have provided free printable Class 12 Chemistry worksheets in PDF format, specifically designed for Unit 5 Surface Chemistry. These practice sets are prepared by expert teachers following the 2025-26 syllabus and exam patterns issued by CBSE, NCERT, and KVS.

Unit 5 Surface Chemistry Chemistry Practice Worksheet for Class 12

Students should use these Class 12 Chemistry chapter-wise worksheets for daily practice to improve their conceptual understanding. This detailed test papers include important questions and solutions for Unit 5 Surface Chemistry, to help you prepare for school tests and final examination. Regular practice of these Class 12 Chemistry questions will help improve your problem-solving speed and exam accuracy for the 2026 session.

Download Class 12 Chemistry Unit 5 Surface Chemistry Worksheet PDF

 

Surface Chemistry
 
1. What do you mean by the term –Adsorption? 
 
2. Explain the terms – Adsorbate and Adsorbent? 
 
3. Give two differences between adsorption and absorption? 
 
4. Why do finely divided solids act as good adsorbents? 
 
5. What is adsorption isotherm? 
 
6. Give an equation showing variation of extent of adsorption with concentration of a solution?
 
7. What do you mean by the term promoter? Give an example. 
 
8. What is the optimum temperature and pH for enzyme catalysed reactions? 
 
9. What are colloids? 
 
10. Give two examples of solid Sol and Gel? 
 
11. Colloid is a state not a substance. Explain? 
 
12. What are associated colloids? Give an example? 
 
13. What is CMC and Kraft‟s temperature? 
 
14. Define the term peptization? 
 
15. What is observed when light is passed through a colloidal solution? 
 
16. State Hardy- Schulze rule? 
 
17. What is a protective colloid?
 
18. Alum is used for purification of water. Why? 
 
19. What are the two types of emulsions? 
 
20. Why does a gas mixed with another gas not form a colloidal system? 
 
21. Explain the terms sorption and desorption. 
 
22. “Chemisorption is highly specific.” Illustrate with an example. 
 
23. “Adsorbents in finely divided form are more effective.” Why? 
 
24. „Generally high temperature is favourable for chemisorption.‟ Why? 
 
25. Name the catalyst used in the following process :
 
(a) Haber‟s process for the manufacture of NH3 gas.
(b) Ostwald process for the manufacture of nitric acid.
 
26. Why gas masks are used by miners in coal mines while working? 
 
27. Write the chemical reaction involved in the preparation of sulphur sol. 
 
28. Name the enzyme which converts milk into curd. 
 
29. What are the optimum temperature and pH at which enzymes are highlyactive. 
 
30. What is the composition of colloidion solution? 
 
31. Why do colloidal particles show Brownian movement? 
 
32. Why does sky appear blue to us? 
 
33. What happens when hydrated ferric oxide and arsenioussulphide sols are mixed in almost equal proportions?
 
34. Gelatin is generally added to ice-cream. Why? 
 
35. Mention the two conditions for the formation of micelles. 
 
36. How is Brownian movement responsible for the stability of sols? 
 
37. Which of the following is more effective in coagulating positively charged hydrated ferric oxide sol :
(i) KCl   (ii) CaSO4   (iii) K3 [Fe(CN)6].
 
38. Mention one use of ZSM–5 catalyst. 
 
39. Define the term – desorption? 
 
40. Write the four differences between physisorption and chemisorption? 
 
41. „Adsorption is an exothermic process „. Explain. 
 
42. What is the sign of ΔH, ΔS and ΔG when a gas is adsorbed by an adsorbent? 
 
43. (a) Which gas is adsorbed more readily on charcoal lump:
ammonia or carbondioxide and why ?
(b) Which adsorbs more of carbon monoxide:
charcoal lump or charcoal powder& why?
 
44. Name the factors which influence the extent of adsorption of a gas on solid.
 
45. Explain Freundlich adsorption isotherm 
 
46. Define the terms – catalysis and catalyst. 
 
47. What is meant by activity and selectivity of a catalyst? 
 
48. What is shape – selective catalysis? Give an example of shape selective catalyst. 
 
49. Give two examples of enzyme catalysed reaction 
 
50. Explain the mechanism of enzyme catalysis. 
 
51. Differentiate between multimolecular and macromolecular colloid? 
 
52 Write the equation for formation of
(a) Sulphur sol.
(b) Ferric hydroxide sol.
 
53. How is a colloidal solution purified by dialysis?
 
54. Define the terms – (a) Brownian movement (b) Electrophoresis? 
 
55. How does an emulsifying agent work? Give an example of emulsifying agent. 
 
56. Explain the effect of temperature on the extent of physical and chemicaladsorption. 
 
57. Define the term peptization and mention its cause. 
 
58. In what way these are different : (a) a sol and a gel (b) a gel and an emulsion. 
 
59. Define the terms :
 
(a) Helmholtz electrical double layer.
(b) Zeta potential.
 
60. Mention the two necessary conditions for the observation of Tyndall Effect 
 
61. Account for the following :
(a) Artificial rain can be caused by spraying electrified sand on theclouds.
(b) Electrical precipitation of smoke.
 
62. Write chemical equations for the preparation of sols :
(a) Gold sol by reduction.
(b) Hydrated ferric oxide sol by hydrolysis.

 

Please click on below link to download CBSE Class 12 Chemistry Surface Chemistry Question Bank Set A

Unit 02 Electrochemistry
CBSE Class 12 Chemistry Electrochemistry Question Bank
CBSE Class 12 Chemistry Electrochemistry Question Bank Set A
CBSE Class 12 Chemistry Electrochemistry Question Bank Set B
CBSE Class 12 Chemistry Electrochemistry Question Bank Set C
CBSE Class 12 Chemistry Electrochemistry Worksheet Set A
CBSE Class 12 Chemistry Electrochemistry Worksheet Set B
CBSE Class 12 Chemistry Electrochemistry Worksheet Set C
Unit 03 Chemical Kinetics
CBSE Class 12 Chemistry Chemical Kinetics Question Bank Set A
CBSE Class 12 Chemistry Chemical Kinetics Question Bank Set B
CBSE Class 12 Chemistry Chemical Kinetics Worksheet
CBSE Class 12 Chemistry Chemical Kinetics Worksheet Set A
CBSE Class 12 Chemistry Chemical Kinetics Worksheet Set B
CBSE Class 12 Chemistry Chemical Kinetics Worksheet Set C
CBSE Class 12 Chemistry Chemical Kinetics Worksheet Set D
Unit 04 The d- and f-Block Elements
CBSE Class 12 Chemistry All Chapters Solved Worksheet
CBSE Class 12 Chemistry D And F Block Elements Question Bank Set A
CBSE Class 12 Chemistry D And F Block Elements Question Bank Set B
CBSE Class 12 Chemistry D And F Block Elements Worksheet Set A
CBSE Class 12 Chemistry D And F Block Elements Worksheet Set B
CBSE Class 12 Chemistry D And F Block Elements Worksheet Set C
CBSE Class 12 Chemistry Organic Compounds Containing Nitrogen Worksheet
CBSE Class 12 Chemistry The d and f Block Elements Worksheet Set A
CBSE Class 12 Chemistry The d and f Block Elements Worksheet Set B
CBSE Class 12 Chemistry The D Block Elements Worksheet
Unit 05 Coordination Compounds
CBSE Class 12 Chemistry Coordination Compounds Question Bank Set A
CBSE Class 12 Chemistry Coordination Compounds Question Bank Set B
CBSE Class 12 Chemistry Coordination Compounds Worksheet Set A
CBSE Class 12 Chemistry Coordination Compounds Worksheet Set B
CBSE Class 12 Chemistry Coordination Compounds Worksheet Set C
CBSE Class 12 Chemistry Coordination Compounds Worksheet Set D
CBSE Class 12 Chemistry Coordination Compounds Worksheet Set E
Unit 06 Haloalkanes and Haloarenes
CBSE Class 12 Chemistry Haloalkanes And Haloarenes Question Bank Set A
CBSE Class 12 Chemistry Haloalkanes And Haloarenes Question Bank Set B
CBSE Class 12 Chemistry Haloalkanes and Haloarenes Worksheet Set A
CBSE Class 12 Chemistry Haloalkanes and Haloarenes Worksheet Set B
CBSE Class 12 Chemistry Haloalkanes And Haloarenes Worksheet Set C
CBSE Class 12 Chemistry Haloalkanes And Haloarenes Worksheet Set D
CBSE Class 12 Chemistry Haloalkanes And Haloarenes Worksheet Set E
Unit 07 Alcohols, Phenols and Ethers
CBSE Class 12 Chemistry Alcohols Phenols And Ethers Question Bank
CBSE Class 12 Chemistry Alcohols Phenols and Ethers Worksheet Set A
CBSE Class 12 Chemistry Alcohols Phenols And Ethers Worksheet Set B
CBSE Class 12 Chemistry Alcohols Phenols And Ethers Worksheet Set C
CBSE Class 12 Chemistry Alcohols Phenols And Ethers Worksheet Set D
CBSE Class 12 Chemistry Alcohols Phenols And Ethers Worksheet Set E
Unit 08 Aldehydes, Ketones and Carboxylic Acids
CBSE Class 12 Chemistry Aldehydes Ketone and Carboxylic Acids Worksheet Set A
CBSE Class 12 Chemistry Aldehydes Ketone and Carboxylic Acids Worksheet Set B
CBSE Class 12 Chemistry Aldehydes Ketones And Carboxylic Acids Question Bank Set A
CBSE Class 12 Chemistry Aldehydes Ketones And Carboxylic Acids Question Bank Set B
CBSE Class 12 Chemistry Aldehydes Ketones And Carboxylic Acids Question Bank Set C
CBSE Class 12 Chemistry Aldehydes Ketones And Carboxylic Acids Question Bank Set D
CBSE Class 12 Chemistry Aldehydes Ketones And Carboxylic Acids Question Bank Set E
Unit 09 Amines
CBSE Class 12 Chemistry Amines Worksheet Set A
CBSE Class 12 Chemistry Amines Worksheet Set B
CBSE Class 12 Chemistry Amines Worksheet Set C
CBSE Class 12 Chemistry Amines Worksheet Set D
CBSE Class 12 Chemistry Amines Worksheet Set E
Unit 10 Biomolecules
CBSE Class 12 Chemistry Biomolecules Question Bank Set A
CBSE Class 12 Chemistry Biomolecules Question Bank Set B
CBSE Class 12 Chemistry Biomolecules Worksheet Set A
CBSE Class 12 Chemistry Biomolecules Worksheet Set B
CBSE Class 12 Chemistry Biomolecules Worksheet Set C
CBSE Class 12 Chemistry Biomolecules Worksheet Set D
z More Worksheets for Class 12 Chemistry
CBSE Class 12 Chemistry All Chapters Questions Bank
CBSE Class 12 Chemistry Solution Question Bank
CBSE Class 12 Chemistry Solutions Question Bank Set A
CBSE Class 12 Chemistry Solutions Question Bank Set B
CBSE Class 12 Chemistry Solutions Worksheet
CBSE Class 12 Chemistry Solutions Worksheet Set A
CBSE Class 12 Chemistry Solutions Worksheet Set B
CBSE Class 12 Chemistry Worksheet Set A Solved
CBSE Class 12 Chemistry Worksheet Set B Solved
CBSE Class 12 Chemistry Worksheet Set C Solved
CBSE Class 12 Chemistry Worksheet Set D
CBSE Class 12 Chemistry Worksheet Set E Solved
CBSE Class 12 Chemistry Worksheet Set F
CBSE Class 12 Chemistry Worksheet Set G Solved
CBSE Class 12 Chemistry Worksheet Set H Solved
CBSE Class 12 Chemistry Worksheet Set I Solved
~ Class 12 Chemistry (Old Chapters)
CBSE Class 12 Chemistry Chemistry in Everyday Life Question Bank
CBSE Class 12 Chemistry Chemistry in Everyday Life Worksheet Set A
CBSE Class 12 Chemistry Chemistry in Everyday Life Worksheet Set B
CBSE Class 12 Chemistry General principles and Processes of isolation of elements Question Bank
CBSE Class 12 Chemistry General Principles and Processes of Isolation of Elements Worksheet Set A
CBSE Class 12 Chemistry General Principles And Processes of Isolation of Elements Worksheet Set B
CBSE Class 12 Chemistry General Principles And Processes of Isolation of Elements Worksheet Set C
CBSE Class 12 Chemistry General Principles And Processes of Isolation of Elements Worksheet Set D
CBSE Class 12 Chemistry General Principles And Processes of Isolation of Elements Worksheet Set E
CBSE Class 12 Chemistry In Everyday Life Question Bank
CBSE Class 12 Chemistry In Everyday Life Worksheet Set A
CBSE Class 12 Chemistry Polymers Worksheet Set A
CBSE Class 12 Chemistry Polymers Worksheet Set B
CBSE Class 12 Chemistry Polymers Worksheet Set C
CBSE Class 12 Chemistry Polymers Worksheet Set D
CBSE Class 12 Chemistry Solid State Question Bank
CBSE Class 12 Chemistry Solid State Question Bank Set A
CBSE Class 12 Chemistry Solid State Question Bank Set B
CBSE Class 12 Chemistry Solid State Worksheet
CBSE Class 12 Chemistry Surface Chemistry Question Bank
CBSE Class 12 Chemistry Surface Chemistry Question Bank Set A
CBSE Class 12 Chemistry Surface Chemistry Question Bank Set B
CBSE Class 12 Chemistry Surface Chemistry Worksheet Set A
CBSE Class 12 Chemistry Surface Chemistry Worksheet Set B
CBSE Class 12 Chemistry Surface Chemistry Worksheet Set C
CBSE Class 12 Chemistry Surface Chemistry Worksheet Set D
CBSE Class 12 Chemistry Surface Chemistry Worksheet Set E
CBSE Class 12 Chemistry The P Block Elements Question Bank
CBSE Class 12 Chemistry The P Block Elements Question Bank Set A
CBSE Class 12 Chemistry The P Block Elements Question Bank Set B
CBSE Class 12 Chemistry The p Block Elements Worksheet Set A
CBSE Class 12 Chemistry The p Block Elements Worksheet Set B
CBSE Class 12 Chemistry The p Block Elements Worksheet Set C
CBSE Class 12 Chemistry The P Block Elements Worksheet Set E
CBSE Class 12 Chemistry The P Block Elements Worksheet Set F
CBSE Class 12 Chemistry The Solid State Worksheet Set A
CBSE Class 12 Chemistry The Solid State Worksheet Set B

More free study material for Chemistry

Unit 5 Surface Chemistry CBSE Class 12 Chemistry Worksheet

Students can use the Unit 5 Surface Chemistry practice sheet provided above to prepare for their upcoming school tests. This solved questions and answers follow the latest CBSE syllabus for Class 12 Chemistry. You can easily download the PDF format and solve these questions every day to improve your marks. Our expert teachers have made these from the most important topics that are always asked in your exams to help you get more marks in exams.

NCERT Based Questions and Solutions for Unit 5 Surface Chemistry

Our expert team has used the official NCERT book for Class 12 Chemistry to create this practice material for students. After solving the questions our teachers have also suggested to study the NCERT solutions  which will help you to understand the best way to solve problems in Chemistry. You can get all this study material for free on studiestoday.com.

Extra Practice for Chemistry

To get the best results in Class 12, students should try the Chemistry MCQ Test for this chapter. We have also provided printable assignments for Class 12 Chemistry on our website. Regular practice will help you feel more confident and get higher marks in CBSE examinations.

Where can I download the latest PDF for CBSE Class 12 Chemistry Surface Chemistry Question Bank Set A?

You can download the teacher-verified PDF for CBSE Class 12 Chemistry Surface Chemistry Question Bank Set A from StudiesToday.com. These practice sheets for Class 12 Chemistry are designed as per the latest CBSE academic session.

Are these Chemistry Class 12 worksheets based on the 2026 competency-based pattern?

Yes, our CBSE Class 12 Chemistry Surface Chemistry Question Bank Set A includes a variety of questions like Case-based studies, Assertion-Reasoning, and MCQs as per the 50% competency-based weightage in the latest curriculum for Class 12.

Do you provide solved answers for CBSE Class 12 Chemistry Surface Chemistry Question Bank Set A?

Yes, we have provided detailed solutions for CBSE Class 12 Chemistry Surface Chemistry Question Bank Set A to help Class 12 and follow the official CBSE marking scheme.

How does solving CBSE Class 12 Chemistry Surface Chemistry Question Bank Set A help in exam preparation?

Daily practice with these Chemistry worksheets helps in identifying understanding gaps. It also improves question solving speed and ensures that Class 12 students get more marks in CBSE exams.

Is there any charge for the Class 12 Chemistry practice test papers?

All our Class 12 Chemistry practice test papers and worksheets are available for free download in mobile-friendly PDF format. You can access CBSE Class 12 Chemistry Surface Chemistry Question Bank Set A without any registration.