The JEE Main 2025 syllabus can be overwhelming to prepare for students. However, the fact is that not each and every chapter has the same weightage. Toppers and exam experts have over the years observed that there are certain important topics for JEE Mains every year in the exam. Paying attention to them will save your time, increase your confidence, and get the highest score.
In this blog, we are going to list down the most important chapters of the JEE Main 2025, subject weightage, and topic-weightage. We will also provide exam tips for JEE Main preparation.
Physics, Chemistry and Mathematics are the foundation of JEE Main. However, rather than treating each chapter as an equal, it is wiser to subdivide them into:
Physics in JEE is all about concept clarity and application. Some students find it interesting, others feel it is the toughest because of numerical solving. By focusing first on high-weightage and repeat topics, you can save a lot of time.
| Subject | Topics |
|---|---|
| Mechanics |
|
| Current Electricity & Magnetism |
|
| Modern Physics (High Scoring) |
|
| Waves & Optics |
|
| Thermodynamics & Heat |
|
| Chapter / Unit | Expected Weightage (%) | Level |
|---|---|---|
| Mechanics (Laws of Motion, Rotational) | 25–30% | Moderate |
| Current Electricity & Magnetism | 15% | Easy-Moderate |
| Modern Physics + Semi Conductors | 12% | Easy |
| Waves & Optics | 10% | Moderate |
| Thermodynamics | 8–10% | Easy |
| Properties of Matter, Fluid Mech | 6–8% | Moderate |
Mathematics is often considered the “time eater” subject. The main challenge is accuracy under time pressure. But if you smartly prepare the important chapters for JEE Mains 2025, you can score well.
| Chapters | Topics |
|---|---|
| Calculus (Most Important) |
|
| Coordinate Geometry |
|
| Algebra |
|
| Vectors & 3D Geometry |
|
| Probability & Statistics |
|
| Chapter / Unit | Weightage (%) |
|---|---|
| Calculus | 30–35% |
| Coordinate Geometry | 20% |
| Algebra (Complex, Matrices) | 20% |
| Probability & Statistics | 7–8% |
| Vectors & 3D Geometry | 10% |
Chemistry is often called the “scoring subject” in JEE because many questions are directly from NCERT. If you prepare the most important chapters for JEE Main Chemistry 2025, you can save a lot of exam time because questions are mostly theory-based.
| Chapter | Topics |
|---|---|
| Physical Chemistry |
|
| Inorganic Chemistry |
|
| Organic Chemistry (Very Important) |
|
| Section | Key Topics | Weightage (%) |
|---|---|---|
| Organic Chemistry | GOC, Carbonyls, Amines, Hydrocarbons | 35% |
| Inorganic Chemistry | Chemical Bonding, Coordination, p-block | 30% |
| Physical Chemistry | Thermodynamics, Mole Concept, Electrochemistry | 25% |
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| Physics Chapter | No. of Questions | Marks | Weightage (%) |
|---|---|---|---|
| Modern Physics | 5 | 20 | 15.9% |
| Current Electricity | 3 | 12 | 9.9% |
| Electrostatics | 3 | 12 | 9.9% |
| Heat and Thermodynamics | 3 | 12 | 9.9% |
| Optics | 3 | 12 | 9.9% |
| Magnetic Effect of Current & Magnetism | 2 | 8 | 6.6% |
| Laws of Motion | 2 | 8 | 6.6% |
| Work, Power & Energy | 2 | 8 | 6.6% |
| Kinematics | 2 | 8 | 6.6% |
| Waves & Sound | 1 | 4 | 3.3% |
| Electromagnetic Waves | 1 | 4 | 3.3% |
| Units and Dimensions | 1 | 4 | 3.3% |
| Experimental Physics | 1 | 4 | 3.3% |
| Others (Oscillations, Fluids, etc.) | 1-2 | 4-8 | 3.3–6.6% |
| Chemistry Chapter | No. of Questions | Marks | Weightage (%) |
|---|---|---|---|
| Chemical Bonding & Molecular Structure | 2 | 8 | 6.6% |
| Classification of Elements & Periodic Table | 3 | 14 | 9.9% |
| Coordination Compounds & Transition Elements | 3 | 14 | 9.9% |
| Atomic Structure | 2 | 8 | 6.6% |
| Thermodynamics & Gaseous State | 2 | 8 | 6.6% |
| Chemical & Ionic Equilibrium | 2 | 8 | 6.6% |
| Organic Chemistry: GOC, Hydrocarbons | 3–4 | 12–16 | 9–13% |
| Aldehydes, Ketones, Carboxylic Acids | 1 | 4 | 3.3% |
| Amines, Alcohols, Phenols, Ethers | 1 | 4 | 3.3% |
| d- and f-Block Elements | 1 | 4 | 3.3% |
| Electrochemistry & Chemical Kinetics | 1–2 | 4–8 | 3.3-6.6% |
| Solutions & Colligative Properties | 1 | 4 | 3.3% |
| Biomolecules, Polymers, Environmental Chemistry | 1 | 4 | 3.3% |
| Others (Redox, Surface Chemistry, States of Matter) | 1 | 4 | 3.3% |
| Mathematics Chapter | No. of Questions | Marks | Weightage (%) |
|---|---|---|---|
| Coordinate Geometry | 5 | 20 | 15.9% |
| Integral Calculus | 3 | 12 | 9.9% |
| Limits, Continuity, Differentiability | 3 | 12 | 9.9% |
| Matrices & Determinants | 2 | 8 | 6.6% |
| Three-Dimensional Geometry | 2 | 8 | 6.6% |
| Vector Algebra | 2 | 8 | 6.6% |
| Complex Numbers & Quadratic | 2 | 8 | 6.6% |
| Probability & Statistics | 2 | 8 | 6.6% |
| Binomial Theorem & Sequences | 1–2 | 4–8 | 3.3–6.6% |
| Differential Equations | 1 | 4 | 3.3% |
| Trigonometry | 1 | 4 | 3.3% |
| Sets, Relations, Functions | 1 | 4 | 3.3% |
| Others (Mathematical Reasoning, Statistics) | 1 | 4 | 3.3% |
It is practically impossible to cover everything in the JEE Syllabus in the last few months. That is why a clever plan is better. Here are detailed tips:
Give a Priority to the Chapter of Importance.
Study the most important JEE Main Physics 2025 and Chemistry 2025 chapters, as well as Calculus and Geometry in Mathematics.
Divide Time Per Subject
Make Sure to Solve Previous Year Papers.
Previous year papers repeat concepts. Attempt at least 10 years of JEE Mains Physics, Maths and Chemistry questions.
Make Formula Sheets
Take Practice Tests To Manage Time.
Practise full 3-hour tests to develop speed and precision.
Do Not Overlook Simple High-Marketing Subjects.
Revise Regularly
The remaining 2 months would be mainly revision of imp topics to be used in JEE Mains, rather than studying new chapters.
Analyse Mistakes
Analyze after each test error. Was it some dumb mistake, concept gap, or time problem? Correct it the same day.
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