Surface Chemistry has 59 questions in JEE Main papers from 2020 to 2024, about 12 per year across all shifts. The most asked topic is Colloids (21 questions), followed by Adsorption (14) and Coagulation (11).
Updated
| Year | Questions | |
|---|---|---|
| 2024 | 3 | |
| 2023 | 16 | |
| 2022 | 11 | |
| 2021 | 20 | |
| 2020 | 9 |
| Topic | Questions | Share of chapter | Last asked |
|---|---|---|---|
| Colloids | 21 | 35% | 2023 |
| Adsorption | 14 | 24% | 2024 |
| Coagulation | 11 | 19% | 2024 |
| Adsorption Isotherms | 6 | 10% | 2023 |
| Catalysis | 4 | 7% | 2023 |
| Colloids and Emulsions | 2 | 3% | 2022 |
| Emulsions and Gels | 1 | 2% | 2022 |
JEE Main 2024 · 5 Apr · Shift 2 · Coagulation
Coagulation of egg, on heating is because of :
Answer: (A)
Step-by-step solutionJEE Main 2024 · 4 Apr · Shift 2 · Adsorption
The adsorbent used in adsorption chromatography is/are -
A. silica gel
B. alumina
C. quick lime
D. magnesia
Choose the most appropriate answer from the options given below :
Answer: (D)
Step-by-step solutionJEE Main 2023 · 13 Apr · Shift 2 · Colloids
Given below are two statements, one is labelled as Assertion A and the other is labelled as Reason R.
Assertion A : The diameter of colloidal particles in solution should not be much smaller than wavelength of light to show Tyndall effect.
Reason R : The light scatters in all directions when the size of particles is large enough.
In the light of the above statements, choose the correct answer from the options given below:
Answer: (A)
Step-by-step solutionJEE Main 2023 · 11 Apr · Shift 2 · Catalysis
The number of correct statements about modern adsorption theory of heterogeneous catalysis from the following is __________
A. The catalyst is diffused over the surface of reactants.
B. Reactants are adsorbed on the surface of the catalyst.
C. Occurrence of chemical reaction on the catalyst's surface through formation of an intermediate.
D. It is a combination of intermediate compound formation theory and the old adsorption theory.
E. It explains the action of the catalyst as well as those of catalytic promoters and poisons.
Answer: 3
Step-by-step solutionJEE Main 2023 · 30 Jan · Shift 2 · Adsorption Isotherms
Answer: 16
Step-by-step solutionJEE Main 2022 · 25 Jul · Shift 2 · Colloids and Emulsions
For micelle formation, which of the following statements are correct?
A. Micelle formation is an exothermic process.
B. Micelle formation is an endothermic process.
C. The entropy change is positive.
D. The entropy change is negative.
Answer: (C)
Step-by-step solutionAll 59 questions are in the free PDF above, grouped by topic.
59 questions from 2020 to 2024, about 12 per year. In 2024 it had 3.
By past papers: Colloids (35%), Adsorption (24%) and Coagulation (19%) of all Surface Chemistry questions.
Yes. The PDF, the answer key and every step-by-step solution on PrepWiser are free, with no login needed to practise.
JEE Main PYQs by year: 2025 · 2024 · 2023 · 2022 · 2021 · 2020
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