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Chemistry - Surface Chemistry

Practise 66 TS 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 TS EAMCET tests.

Surface Chemistry has been asked in 24 of the 24 years of TS EAMCET papers analysed (2001–2024), with 66 questions in all. 64% of them were easy, 35% moderate and 2% tough. Most of its questions came from 2021, with 7 questions that year. In the last three years (2022–2024) it had 15 questions across 17 papers, about 0.9 per paper.

The chapter's 7 topics are not weighted equally: Properties of colloidal solution (18 questions, 27%), Adsorption isotherms (13 questions, 20%), and Adsorption (12 questions, 18%) have been asked the most. Properties of colloidal solution has also led over the last five years, with 10 questions. Catalysis and Theories of Catalysis has produced the most tough questions (1).

  1. 1The correct statements about the properties of colloidal solutions are A. Tyndall effect is used to distinguish between a colloidal solution04 May, 2025 (M)Colloids
  2. 2Match the following List - 1 List - 2 A Sol I cloud B Foam II Whipped cream C Gel III Paint D Aerosol IV Butter The correct answer is03 May, 2025 (E)Colloids
  3. 3Which of the following is not correct about Freundlich adsorption isotherm?02 May, 2025 (M)Adsorption isotherms
  4. 4The most effective coagulating agent for antimony sulphide sol is02 May, 2025 (E)Properties of colloidal solution
  5. 510 mL of 0.5 M NaCl is required to coagulate 1 L of sol in 2 hours time. The flocculating value of NaCl (in milli moles) is10 May, 2024 (M)Properties of colloidal solution
  6. 6Adsorption of a gas on an adsorbent follows Freundlich adsorption isotherm. The slope and intercept (on -axis) of the isotherm are 0.5 and 109 May, 2024 (M)Adsorption isotherms
  7. 7Adsorption of a gas on a solid adsorbent follows Freundlich adsorption isotherm. If is the mass of the gas adsorbed on mass ' ' of the adsor09 May, 2024 (E)Adsorption
  8. 8Which of the following can form ionic micelles in water?14 May, 2023 (M)Preparation and Purification of colloids
  9. 9The sol prepared by Bredig's Arc method is X and the charge of sol particles of it is q. and q are respectively.14 May, 2023 (E)Preparation and Purification of colloids
  10. 10The graph given below is showing the relation between the extent of adsorption and Pressure at different temperatures. The correct order of 13 May, 2023 (M)Adsorption isotherms
  11. 11Match the following The correct answer is13 May, 2023 (E)Emulsions and Gels
  12. 12Identify the factors which favour the physical adsorption from the following. (I) High surface area (II) Low temperatures (III) High tempera12 May, 2023 (M)Adsorption
  13. 13Consider the following about the Tyndall effect. (I) It is used to distinguish between a true and colloidal solution (II) It is possible onl12 May, 2023 (E)Properties of colloidal solution
  14. 14of a gas is adsorbed on of solid at . If the pressure is increased at of the gas is adsorbed by the same solid at the same temperature. What20 Jul, 2022 (M)Adsorption isotherms
  15. 15The process in which colloids, when subjected to DC electric field move towards an electrode is20 Jul, 2022 (E)Properties of colloidal solution
  16. 16Which of the following does not show Tyndall effect?19 Jul, 2022 (M)Properties of colloidal solution
  17. 17The coagulation of of a positive colloid took place when of was added to it without changing the volume much. The flocculation value of for 19 Jul, 2022 (E)Properties of colloidal solution
  18. 18For As 2 S 3 sol, the most effective coagulating agent is18 Jul, 2022 (M)Properties of colloidal solution
  19. 19Catalysts in the following reactions are I) CH 3 COOCH 3 l + H 2 O l CH 3 COOH aq + CH 3 OH l II) 2 SO 2 g 2 SO 3 g III) 2 SO 2 g + O 2 g 2 18 Jul, 2022 (E)Catalysis and Theories of Catalysis
  20. 20For precipitating sol, the best precipitating agent is06 Aug, 2021 (M)Properties of colloidal solution
  21. 21The shape of isobar for physical adsorption and adsorption isobar for chemisorption, respectively, are06 Aug, 2021 (E)Adsorption
  22. 22The most effective coagulating agent among the options for Sb 2 S 3 sol is05 Aug, 2021 (M)Properties of colloidal solution
  23. 23Which of the following statements is false during adsorption of gas molecule on a metal surface?05 Aug, 2021 (E)Adsorption
  24. 24Which of the following options are correct?04 Aug, 2021 (M)Adsorption
  25. 25The trend in the colligative properties for the same concentration of BaCl 2 , MgCl 2 and NaCl , respectively, is04 Aug, 2021 (E)Properties of colloidal solution
  26. 26Which plot is the adsorption isobar for chemisorption ?04 Aug, 2021 (E)Adsorption isotherms
  27. 27The charge of "SnO -sol" in alkaline and acidic medium are respectively (Hint is amphoteric oxide)14 Sep, 2020 (M)Properties of colloidal solution
  28. 28Which of the following is true for spontaneous adsorption?14 Sep, 2020 (E)Adsorption
  29. 29To resist the coagulation of gold sol; 1 cC of is added to it in the presence of gelatin. The gold number of gelatin is11 Sep, 2020 (E)Properties of colloidal solution
  30. 30The gold numbers of gelatin, haemoglobin and sodium acetate are and , respectively. The protective actions will be in the order10 Sep, 2020 (M)Properties of colloidal solution
  31. 31Which of the following statements is correct for chemisorption?10 Sep, 2020 (E)Adsorption
  32. 32In an adsorption experiment, a graph between log x / m vs log P was fotund to be linear with a slope of 45 o . The intercept on the log x / 09 Sep, 2020 (M)Adsorption isotherms
  33. 33Which of the following reaction is auto catalytic?09 Sep, 2020 (E)Catalysis and Theories of Catalysis
  34. 34Which of the following statements is/are not correct? (A) Adsorption is accompanied by decrease in enthalpy as well as decrease in entropy o06 May, 2019 (M)Adsorption isotherms
  35. 35Identify the correct statements from the following: (i) A closed vessel containing and is an aerosol. (ii) Milk is an emulsion. (iii) Smoke 04 May, 2019 (M)Colloids
  36. 36The most effective coagulating agent among the following for sol is04 May, 2019 (E)Properties of colloidal solution
  37. 37Which one of the following is used as an eye lotion?03 May, 2019 (M)Properties of colloidal solution
  38. 38In the preparation of chlorine by the electrolysis of brine, the reaction taking place at the anode is03 May, 2019 (E)Properties of colloidal solution
  39. 39Which of the following statements about TLC are correct? (i) Glycine is identified on TLC plate due to its colour. (ii) Amino acids can be d07 May, 2018 (M)Adsorption
  40. 40In the Freundlich isotherm plot of , the intercept is (where, and are mass of the gas, mass of adsorbent, pressure and constant which depend07 May, 2018 (M)Adsorption isotherms
  41. 41Identify the correct catalyst and reaction conditions for the controlled oxidation of methane to (i) methanol , (ii) methanal and ethane to 05 May, 2018 (M)Catalysis and Theories of Catalysis
  42. 42If the value of is equal to 1 in Freundlich adsorption isotherm, then mass of adsorbate, mass of the absorbent, pressure of the gas)05 May, 2018 (M)Adsorption isotherms
  43. 43Fog is a dispersion of05 May, 2018 (E)Colloids
  44. 44The following graph is obtained for physisorption of a gas as a function of pressure at different temperatures. The correct order of the tem04 May, 2018 (M)Adsorption isotherms
  45. 45Identify the correct statements from the following. (i) In the oxidation of oxalic acid with in acid medium, acts as auto catalyst. (ii) CdS04 May, 2018 (E)Colloids
  46. 46Which of the following is true for spontaneous adsorption of gas without dissociation on solid surface2017Adsorption
  47. 47Which one of the following is an emulsion?2016Emulsions and Gels
  48. 48Which one of the following is used in the hardening of leather?2015Colloids
  49. 49What are the substances which mimic the natural chemical messengers?2014Catalysis and Theories of Catalysis
  50. 50Assertion (A) van der Waals' forces are reponsible for chemisorptions. Reason (R) High temperature is favourable for chemisorptions. The cor2014Adsorption

Frequently Asked Questions

1.How many questions are available for Surface Chemistry?

This chapter includes 66 questions compiled from TS EAMCET papers spanning 2001 to 2025.

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

These are TS 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 TS EAMCET Chemistry?

Surface Chemistry has appeared in 25 of the 25 years of TS EAMCET papers covered here, with 66 questions across 59 papers - about one per paper it appears in.

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

Of the 66 questions analysed for this chapter, 64% are easy, 35% moderate and 2% tough. 2021 had the most, with 7 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 - 18 questions (27%)
  • Adsorption isotherms - 13 questions (20%)
  • Adsorption - 12 questions (18%)
  • Catalysis and Theories of Catalysis has produced the most tough questions (1).
6.Is Surface Chemistry's weightage in TS EAMCET going up or down?

Across all 59 papers analysed, Surface Chemistry has averaged about 1.1 questions per paper. In the last three years (2022–2024), that average has fallen, at about 0.9 questions per paper. Use the year-wise numbers on this page for the exact trend before you decide how much time to give it.