JEE Main Some Basic Concepts in Chemistry: Weightage, Key Concepts and Study Plan
Some Basic Concepts in Chemistry in JEE Main: 128 questions across 2022–2026, rank #10 of 20 in Chemistry, stable momentum. Year-wise data, key concepts and a study plan.
Edurack
October 21, 2026
Some Basic Concepts in Chemistry is a dependable mid-weight chapter in JEE Main Chemistry, ranked #10 of 20 with 5.1% of recent questions. Here is what five years of JEE Main questions say about it, and how to prepare.
At a glance
- 128 questions across 2022–2026, all shifts
- 4.4% of Chemistry over five years and 5.1% in 2024–2026
- Rank #10 of 20 Chemistry chapters by recent weight
- Momentum: Stable
- Asked in 5 of 5 years; busiest year 2023 with 27 questions
- 23 questions in the 2026 papers
Year-wise questions
| Year | 2022 | 2023 | 2024 | 2025 | 2026 | Total |
|---|---|---|---|---|---|---|
| Questions | 24 | 27 | 27 | 27 | 23 | 128 |
How Some Basic Concepts in Chemistry compares inside Chemistry
| Rank | Chapter | Total Qs | 2024–26 share | Momentum |
|---|---|---|---|---|
| 8 | Solutions | 143 | 5.5% | Stable |
| 9 | Atomic Structure | 132 | 5.2% | Stable |
| 10 | Some Basic Concepts in Chemistry | 128 | 5.1% | Stable |
| 11 | d- and f-Block Elements | 137 | 5.0% | Stable |
| 12 | Chemical Thermodynamics | 126 | 4.8% | Stable |
Concepts that repeat
These specific ideas came back most often inside Some Basic Concepts in Chemistry.
| Concept | 2022 | 2023 | 2024 | 2025 | 2026 | Total |
|---|---|---|---|---|---|---|
| Mole Concept and Molar Mass | 4 | 5 | 2 | 15 | 16 | 42 |
| Percentage Composition and Equivalent Weight | 3 | 2 | 7 | 8 | 9 | 29 |
| Stoichiometry and Limiting Reagent | 7 | 13 | 4 | 0 | 2 | 26 |
Start your practice with these. Each one has appeared in several different years, so it is worth knowing the question styles.
What the syllabus covers
Laws of chemical combination, atomic and molecular masses, mole concept, molar mass, percentage composition, empirical and molecular formulae, chemical equations and stoichiometry.
A checklist to tick off:
- Laws of chemical combination
- Atomic and molecular masses
- Mole concept
- Molar mass
- Percentage composition
- Empirical and molecular formulae
- Chemical equations and stoichiometry
What to focus on
Mole-concept stoichiometry, the limiting reagent and concentration terms. These are the first numericals students meet, so build speed here.
A study plan for this chapter
Treat it as a dependable source of marks and keep it in your regular revision cycle. If you divide your Chemistry time in proportion to recent weightage, this chapter earns about 5% of it.
- Days 1–4: theory and solved examples.
- Days 5–9: chapter-wise PYQs and error log.
- Ongoing: a short revision every ten days.
Keep reading
- The full ranking: JEE Main Chemistry chapter-wise weightage
- Next chapter by weight: d- and f-Block Elements
- A heavier neighbour: Atomic Structure
See Some Basic Concepts in Chemistry on the weightage page →
Frequently Asked Questions
How many questions has Some Basic Concepts in Chemistry had in JEE Main?
128 questions across 2022–2026, counting every shift: 2022: 24, 2023: 27, 2024: 27, 2025: 27, 2026: 23.
Is Some Basic Concepts in Chemistry important for JEE Main Chemistry?
It ranks #10 of 20 Chemistry chapters by recent weight, which puts it in tier 2 of 3 for preparation. Its momentum is labelled Stable.
How should I start Some Basic Concepts in Chemistry?
Mole-concept stoichiometry, the limiting reagent and concentration terms. Then solve chapter-wise previous-year questions.