JEE Strategy2 min read
JEE Main Low-Weightage Chapters: How to Finish Them Fast
The 10 lightest JEE Main chapters by recent weight, why they are still worth a short, focused pass, and a simple way to finish each one quickly.
Edurack
October 21, 2026
Not every chapter deserves the same hours. The lightest chapters carry only a small share of the paper, so the goal is to finish them fast and well, not to ignore them.
The 10 lightest chapters
| Chapter | Subject | Total Qs | Share of whole paper (2024–26) | Momentum |
|---|---|---|---|---|
| Experimental Skills | Physics | 42 | 0.6% | Stable |
| Principles Related to Practical Chemistry | Chemistry | 46 | 0.7% | Stable |
| Electromagnetic Waves | Physics | 85 | 0.8% | Fading |
| Organic Compounds Containing Halogens | Chemistry | 58 | 0.8% | Stable |
| Gravitation | Physics | 100 | 0.9% | Fading |
| Kinetic Theory of Gases | Physics | 87 | 1.0% | Stable |
| Electronic Devices | Physics | 108 | 1.2% | Stable |
| Thermodynamics | Physics | 106 | 1.2% | Stable |
| Laws of Motion | Physics | 121 | 1.2% | Fading |
| Work, Energy and Power | Physics | 110 | 1.2% | Stable |
A short-pass method
- Read the syllabus scope once and tick what you know.
- Learn the handful of formulas or facts the chapter is built on.
- Solve the chapter's previous-year questions in a single sitting.
- Log mistakes and revisit them once.
Where to start inside each
- Experimental Skills: Least count and zero error for vernier calipers and screw gauge, the principle behind each listed experiment, and which reading or graph gives the required quantity.
- Principles Related to Practical Chemistry: Colours of salts and precipitates, tests for functional groups and the logic of titrations.
- Electromagnetic Waves: A short, recall-based chapter: the order of the spectrum by wavelength and frequency, the use of each region, and the idea of displacement current.
- Organic Compounds Containing Halogens: SN1 versus SN2 and elimination, the reactivity order of alkyl halides, and the uses and effects of the compounds in the syllabus.
- Gravitation: Orbital and escape velocity, satellite energy, variation of g with height and depth, and Kepler's laws.
- Kinetic Theory of Gases: RMS, mean and most probable speeds, degrees of freedom, the equipartition theorem and the specific heat ratio.
Time budget
A reasonable rule: give a light chapter about a week of focused effort across your whole preparation, including its PYQs and one revision, and no more.
Practise chapter-wise JEE PYQs →
Frequently Asked Questions
Which JEE Main chapter has the least weightage?
Experimental Skills (Physics) has the smallest share of the whole paper in 2024–26 among current chapters.
Can I skip low-weightage chapters?
We recommend a short, focused pass instead of skipping. They are quick marks.