Surface Chemistry carries approximately 2-3% weightage under the JEE Advanced 2025 exam according to the new JEE Advanced 2025 syllabus and previous years’ trends. The subject is considered moderate as per conceptual depth. Common concepts such as adsorption, catalysis, colloids, and emulsions are repeatedly asked in JEE Advanced previous year question papers. Hence, revising these core concepts is highly recommended for good exam performance.
Must Read Articles:
- Download JEE Advanced Last 10 year PYQ for Free
- Download JEE 2024 Question Paper with Detailed Solutions
Most important Topics for JEE Advanced 2025 (Surface Chemistry):
Based on the JEE Advanced previous year paper trends, the following are the high-weightage topics in JEE Advanced 2025:
- Catalysis (JEE Advanced 2020, Paper 1)
- Adsorption and Adsorption Isotherms (JEE Advanced 2021, Paper 2
- Colloids and Their Properties (JEE Advanced 2019, Paper 1)
- Emulsions and Gels (JEE Advanced 2020, Paper 2)
- Surface Area and its Measurement (JEE Advanced 2018, Paper 1)
JEE Advanced previous year question papers and mock tests can assist IIT Aspirants to achieve higher rankings in JEE Advanced 2025.
Listed below the most repeated questions JEE Advanced Previous Year Questions (PYQs) for Solid State along with detailed solutions
A) irreversible sols
B) prepared from inorganic compounds
C) coagulated by adding electrolytes
D) self-stabilizing
(JEE Advanced 2006 )
View Solution
[Use given data: Surface area of charcoal = 1.5 x 102 m2g-1; Avogadro’s number (NA) = 6.0 x 1023 mol-1]
(JEE Advanced 2024)
A) Chemisorption results in a unimolecular layer.
B) The enthalpy change during physisorption is in the range of 100 to 140 kJ mol-1.
C) Chemisorption is an endothermic process.
D) Lowering the temperature favors physisorption processes.
A) Adsorption is always exothermic
B) Physisorption may transform into chemisorption at high temperature
C) Physisorption increases with increasing temperature but chemisorption decreases with increasing temperature
D) Chemisorption is more exothermic than physisorption, however it is very slow due to higher energy of activation
A) Preferential absorption of ions on their surface from the solution
B) Preferential absorption of solvent on their surface from the solution
C) Attraction between different particles having opposite charges on their surface
D) Potential difference between the fixed layer and the diffused layer of opposite charges around the colloidal particles
A) decrease in pressure
B) increase in temperature
C) decrease in surface area
D) decrease in temperature
JEE Advanced 2025 Chapter-Wise Weightage For Chemistry
| Chapter Name | Approx. Weightage (%) | No. of Expected Questions |
|---|---|---|
| Chemical Thermodynamics | 6–8% | 2 |
| Atomic Structure | 5% | 1–2 |
| Chemical Bonding & Molecular Structure | 6–7% | 2 |
| Equilibrium (Ionic + Chemical) | 7–9% | 2–3 |
| Electrochemistry | 5–6% | 1–2 |
| Solutions & Colligative Properties | 4–5% | 1–2 |
| Redox Reactions | 3% | 1 |
| Surface Chemistry | 3% | 1 |
| Solid State | 3–4% | 1 |
| Kinetics | 5–6% | 1–2 |
| Organic Chemistry (General + Named Reactions) | 12–14% | 4–5 |
| Biomolecules, Polymers, Chemistry in Everyday Life | 4–5% | 1–2 |
| Coordination Compounds | 6–7% | 2 |
| The d- and f-Block Elements | 5% | 1–2 |
| Qualitative Inorganic Analysis | 4% | 1 |
JEE Advanced 2025 Difficulty Analysis For Chemistry
| Chapter Name | Difficulty Level (Easy / Moderate / Hard) |
|---|---|
| Chemical Thermodynamics | Moderate to Hard |
| Atomic Structure | Moderate |
| Chemical Bonding | Moderate |
| Equilibrium | Hard |
| Electrochemistry | Hard |
| Solutions | Moderate |
| Redox Reactions | Easy |
| Surface Chemistry | Easy |
| Solid State | Moderate |
| Chemical Kinetics | Moderate |
| Organic Chemistry (Full) | Moderate to Hard |
| Biomolecules & Polymers | Easy |
| Coordination Compounds | Hard |
| d- and f-Block Elements | Moderate |
| Inorganic Qualitative Analysis | Hard |
Download Last 10 years JEE Advanced Previous Year Question Papers (2024 - 2016)
IIIT JEE Advanced Previous Year Question Papers
You can download free IIT JEE Advanced Previous Year Question Paper PDFs from the table provided below:-
| JEE Advanced Paper Name | Question Paper Link |
| JEE Advanced 2024 Question Paper PDF | Click Here |
| JEE Advanced 2023 Question Paper PDF | Click Here |
| JEE Advanced 2022 Question Paper PDF | Click Here |
| JEE Advanced 2021 Question Paper PDF | Click Here |
| JEE Advanced 2020 Question Paper PDF | Click Here |
| JEE Advanced 2019 Question Paper PDF | Click Here |
| JEE Advanced 2018 Question Paper PDF | Click Here |
| JEE Advanced 2017 Question Paper PDF | Click Here |
| JEE Advanced 2016 Question Paper PDF | Click Here |
Frequently Asked Questions:-
1. Is Surface Chemistry removed from JEE Advanced 2025?
No, Surface Chemistry is not removed from JEE Advanced 2025 syllabus. It is still an important section of the Physical Chemistry part. Questions related to adsorption, catalysis, colloids, and emulsions are asked repeatedly, so be sure to study them as a part of your preparation.
2. Is Surface Chemistry important for JEE Advanced?
Yes, Surface Chemistry is important to JEE Advanced. It may have a 2-3% weightage, but it's always there in Paper 1 and Paper 2. Key topics like adsorption isotherms, catalysis, and colloidal properties come up frequently. Even though it's weightage is less but it can flip your score, so don't skip it!
3. Is it easy to score 120 in JEE Advanced?
120 marks in JEE Advanced is achievable with a right strategy. It's not simple, but with right preparation, consistent practice, and practice from previous year question papers, it can be achieved. The trick is to practice high-weightage questions, remain calm during the test, and utilize your time in the best possible manner. It's more of smart working, not hard working.
4. Which IIT is making the 2025 paper?
The question paper for JEE Advanced 2025 will be prepared by IIT Kanpur. This means the exam can be in a unique style and format, but you can expect the same level of difficulty and questions as in the past years. Stay updated with official announcements on the JEE Advanced website to track any alteration.
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