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Chemistry - Surface Chemistry

Practise 127 AP EAMCET previous year questions on Surface Chemistry, compiled from papers spanning 2001 to 2025. Each question is pulled directly from the actual exam paper it appeared in, so you're practising in the exact style and difficulty AP EAMCET tests.

Surface Chemistry has been asked in 24 of the 24 years of AP EAMCET papers analysed (2001–2024), with 127 questions in all. 74% of them were easy, 24% moderate and 2% tough. Most of its questions came from 2022, with 20 questions that year. In the last three years (2022–2024) it had 49 questions across 28 papers, about 1.8 per paper.

The chapter's 7 topics are not weighted equally: Properties of colloidal solution (30 questions, 24%), Colloids (26 questions, 20%), and Adsorption (25 questions, 20%) have been asked the most. Over the last five years the most frequent topics have been Colloids (20), Properties of colloidal solution (19), and Adsorption (12). Properties of colloidal solution has produced the most tough questions (1).

  1. 1Match the following List-I (Reaction) List-II (Catalyst) A) Hydrogenation of vegetable oils I. Ni B) Decomposition of potassium chlorate II.27 May, 2025 (M)Catalysis and Theories of Catalysis
  2. 2The critical micelle concentration (CMC) of a soap solution is . Identify the correct statements about this solution. I. The micelle is stab27 May, 2025 (M)Colloids
  3. 3Choose the incorrect statement from the following26 May, 2025 (M)Colloids
  4. 4Which of the following statements regarding adsorption theory of heterogeneous catalysis is not correct?26 May, 2025 (M)Catalysis and Theories of Catalysis
  5. 5Match the following List-I (sol) List-II (Method of preparation) A) III) Hydrolysis B) Au I) Bredig's arc method C) S II) Oxidation D) IV) D26 May, 2025 (E)Colloids
  6. 6In a Freundlich adsorption isotherm, if the slope is unity and k is 0.1, the extent of adsorption at 2 atm is24 May, 2025 (M)Adsorption isotherms
  7. 7The adsorption of a gas on a solid surface follows Freundlich adsorption isotherm. At , the gas pressure is 2 atm. What is the value of and 23 May, 2025 (M)Adsorption isotherms
  8. 8Match the following: List - I (colloidal solution) List - II (Use) Colloidal antimony I) Eye lotion Argyrol II) Intramuscular injection Coll23 May, 2025 (E)Colloids
  9. 9Adsorption of a gas on solids follows Freundlich adsorption isotherm. The graph drawn between (on y -axis) and (on x -axis) is a straight li23 May, 2025 (E)Adsorption
  10. 10Which one of the following is not the correct characteristic property of physical adsorption?22 May, 2025 (M)Adsorption
  11. 11In each of four separate beakers (I, II, III, IV), X mL of colloidal solution is present. Equal volume and equal concentration of of KCl, an22 May, 2025 (M)Properties of colloidal solution
  12. 12In a colloidal solution, both the dispersed phase and dispersion medium are in liquid phase. What is the type of colloid ?22 May, 2025 (E)Colloids
  13. 13The equation which represents Freundlich adsorption isotherm is ( amount of gas, mass of solid)22 May, 2025 (E)Adsorption isotherms
  14. 14Identify the correct statements from the following I) Sulphur sol is an example for multi molecular colloid. II) Starch sol is an example fo21 May, 2025 (M)Colloids
  15. 15Identify the catalytic reaction in which both reactants are in different phases.21 May, 2025 (E)Catalysis and Theories of Catalysis
  16. 16Consider the following. Statement-I : Gold sol is prepared by Bredig's arc method. Statement-II : Bredig's arc method involves only dispersi21 May, 2025 (E)Preparation and Purification of colloids
  17. 17Two statements are given below Statement I: Adsorption of a gas on the surface of charcoal is primarily an exothermic reaction Statement II:23 May, 2024 (M)Adsorption
  18. 18The critical temperature of A. B. C. D gases are respectively. The quantity of gas adsorbed per gram of charcoal at same pressure is least f23 May, 2024 (M)Adsorption isotherms
  19. 19The following data is obtained for coagulating a positively charged sol in 2 hours What is the coagulating value of electrolyte for this sol22 May, 2024 (M)Properties of colloidal solution
  20. 20Which of the following solutions is used in the styptic action which prevents bleeding of blood?22 May, 2024 (E)Properties of colloidal solution
  21. 21' ' is a protecting colloid. The following data is obtained for preventing the coagulation of 10 mL of gold sol to which 1 mL of is added. W22 May, 2024 (E)Properties of colloidal solution
  22. 22The correct statement regarding chemisorption is21 May, 2024 (M)Adsorption
  23. 23Which of the following is incorrectly matched?21 May, 2024 (M)Properties of colloidal solution
  24. 24Three layers of liquid are flowing over fixed solid surface as shown below. The correct order of velocity of liquid in these layers is21 May, 2024 (E)Properties of colloidal solution
  25. 25Match List - I, with List - II Correct answer is21 May, 2024 (E)Colloids
  26. 26Identify the method of preparation of a colloidal sol from the following21 May, 2024 (E)Preparation and Purification of colloids
  27. 27' X ' is a protecting colloid. The following data is obtained for preventing the coagulation of 10 mL of gold sol to which 1 mL of is added.20 May, 2024 (M)Properties of colloidal solution
  28. 28Which sol is used as intramuscular injection?20 May, 2024 (M)Colloids
  29. 29Which of the following general reaction is an example for heterogeneous catalysis?20 May, 2024 (E)Catalysis and Theories of Catalysis
  30. 30Match List I with List II20 May, 2024 (E)Emulsions and Gels
  31. 31Which of the following has maximum coagulating power in the coagulation of positively charged sol?19 May, 2024 (E)Properties of colloidal solution
  32. 32Given below are two statements. Statement-I : Easily liquefiable gases are readily adsorbed Statement-II : Adsorption enthalpy for physisorp18 May, 2024 (M)Adsorption
  33. 33The validity of Freundlich isotherm can be verified by plotting18 May, 2024 (M)Adsorption isotherms
  34. 34The process of converting a precipitate into colloidal solution is known as19 May, 2023 (M)Preparation and Purification of colloids
  35. 35Match the following The correct answer is18 May, 2023 (M)Colloids
  36. 36Given below are two statements (S-I and S-II) S-I: Scattering of light by dispersed particles of colloidal system is known as Tyndall effect18 May, 2023 (M)Colloids
  37. 37Consider the following statements for a gold sol (I) It is macromolecular colloid (II) It is a lyophobic sol (III)It is a negatively charged18 May, 2023 (E)Colloids
  38. 38The greater the valence of the flocculating ion added, the greater is its power to cause precipitation of a colloid. This rule is17 May, 2023 (M)Properties of colloidal solution
  39. 39This equation represents the preparation of gold sol by .17 May, 2023 (E)Colloids
  40. 40Which of the following is an example of a multi molecular colloid?16 May, 2023 (M)Colloids
  41. 41In which of the following, the sol is not correctly matched with respect to its charge? I. sol; + ve sol II. Starch sol; +ve sol III. sol; -16 May, 2023 (E)Colloids
  42. 42The graph drawn between and is shown below with intercept . What is the value of at a pressure of ?16 May, 2023 (E)Adsorption isotherms
  43. 43Which of the following is not the application of adsorption?15 May, 2023 (M)Adsorption
  44. 44The most effective coagulating agent for antimony sulphide sol is15 May, 2023 (E)Colloids
  45. 45The plot of (y-axis) and -axis) is a straight line inclined at an angle of . When the intercept, is 10 and pressure is the amount of solute 15 May, 2023 (E)Adsorption isotherms
  46. 46The correct order of adsorption of the following gases on the surface of charcoal is08 Jul, 2022 (M)Adsorption
  47. 47Relatively which conditions favour the faster Brownian movement of colloidal particles in solution?08 Jul, 2022 (M)Properties of colloidal solution
  48. 48The general formula of zeolite is . In this ' ' represents08 Jul, 2022 (E)Catalysis and Theories of Catalysis
  49. 49Assertion (A) Adsorption is an exothermic process. Reason (R) Physisorption of a gas on a solid surface is normally reversible.08 Jul, 2022 (E)Adsorption
  50. 50When a dilute solution is mixed with excess of dilute , the colloidal solution formed is08 Jul, 2022 (E)Properties of colloidal solution

Frequently Asked Questions

1.How many questions are available for Surface Chemistry?

This chapter includes 127 questions compiled from AP EAMCET papers spanning 2001 to 2025.

2.Are these questions only from AP EAMCET, or from other exams too?

These are AP EAMCET questions specifically for the Surface Chemistry chapter. Questions from other exams like JEE Main or NTA Abhyas (JEE Main) are organised separately under their respective exam sections.

3.Is Surface Chemistry an important chapter for AP EAMCET Chemistry?

Surface Chemistry has appeared in 25 of the 25 years of AP EAMCET papers covered here, with 127 questions across 86 papers - about one per paper it appears in.

4.What is the difficulty level of Surface Chemistry questions in AP EAMCET?

Of the 127 questions analysed for this chapter, 74% are easy, 24% moderate and 2% tough. 2022 had the most, with 20 questions.

5.Which topics in Surface Chemistry should I focus on?

These topics have carried the most weightage in Surface Chemistry:

  • Properties of colloidal solution - 30 questions (24%)
  • Colloids - 26 questions (20%)
  • Adsorption - 25 questions (20%)
  • Properties of colloidal solution has produced the most tough questions (1).
6.Is Surface Chemistry's weightage in AP EAMCET going up or down?

Across all 86 papers analysed, Surface Chemistry has averaged about 1.5 questions per paper. In the last three years (2022–2024), that average has risen, at about 1.8 questions per paper. Use the year-wise numbers on this page for the exact trend before you decide how much time to give it.