JEE Main Some Basic Concepts in Chemistry weightage 2022–2026
Chemistry
Some Basic Concepts in Chemistry contributed 128 of the 2,932 JEE Main Chemistry questions asked across all shifts between 2022 and 2026 — 4.4% of the subject. In 2024–2026 its share was 5.1%, which makes it the #10 chapter of 20 in the current syllabus by recent weightage (about 1.7% of the whole paper).
Year by year it was asked 24 in 2022, 27 in 2023, 27 in 2024, 27 in 2025 and 23 in 2026. It appeared in 5 of 5 years, with its highest count in 2023.
Its share has stayed fairly steady: 5.2% of the Chemistry paper on average in 2024–2026, against 4.7% in 2022–2023.
The most repeated concepts from this chapter in the dataset are Mole Concept and Molar Mass (42 questions), Percentage Composition and Equivalent Weight (29 questions) and Stoichiometry and Limiting Reagent (26 questions).
Questions
128
4.4% of Chemistry
Share 2024–2026
5.1%
2022–2023: 4.7% avg
Rank in subject
#10
of 20 chapters
Years asked
5 of 5
Questions per year
Share of the Chemistry paper by year: 2022 4% · 2023 5.5% · 2024 6.2% · 2025 4.5% · 2026 4.8%
What the JEE Main syllabus covers
Laws of chemical combination, atomic and molecular masses, mole concept, molar mass, percentage composition, empirical and molecular formulae, chemical equations and stoichiometry.
Most repeated concepts in Some Basic Concepts in Chemistry
| # | Concept | 2022 | 2023 | 2024 | 2025 | 2026 | Total |
|---|---|---|---|---|---|---|---|
| 1 | Mole Concept and Molar MassSome Basic Concepts in Chemistry | 4 | 5 | 2 | 15 | 16 | 42 |
| 2 | Percentage Composition and Equivalent WeightSome Basic Concepts in Chemistry | 3 | 2 | 7 | 8 | 9 | 29 |
| 3 | Stoichiometry and Limiting ReagentSome Basic Concepts in Chemistry | 7 | 13 | 4 | – | 2 | 26 |
Frequently asked questions
How many questions come from Some Basic Concepts in Chemistry in JEE Main?
Some Basic Concepts in Chemistry had 128 questions across all JEE Main shifts from 2022 to 2026, which is 4.4% of Chemistry. Year by year: 24 in 2022, 27 in 2023, 27 in 2024, 27 in 2025 and 23 in 2026.
Is Some Basic Concepts in Chemistry important for JEE Main?
It ranks #10 of 20 Chemistry chapters by share of questions in 2024–2026 (5.1% of the subject). Its share has been steady.
Which Some Basic Concepts in Chemistry concepts are asked most in JEE Main?
Mole Concept and Molar Mass (42 questions), Percentage Composition and Equivalent Weight (29 questions) and Stoichiometry and Limiting Reagent (26 questions) are the most repeated concepts from this chapter in the dataset.
What does the JEE Main syllabus cover in Some Basic Concepts in Chemistry?
Laws of chemical combination, atomic and molecular masses, mole concept, molar mass, percentage composition, empirical and molecular formulae, chemical equations and stoichiometry.
Does a high weightage mean Some Basic Concepts in Chemistry will be asked again?
No. Weightage shows past frequency, not a promise. Use it to prioritise, and practise previous-year questions to see how the chapter is tested.
Practise JEE Main Chemistry PYQs
Solve JEE previous-year questions with solutions on Edurack.
More JEE Main guides
Counts are compiled from Edurack's JEE Main last five-year analysis (2022–2026) and count questions across all shifts and sessions of each year. Because the number of shifts changes every year, trends compare each chapter's share of the paper among chapters still in the syllabus, not raw counts. Past frequency is a trend guide, not a prediction. Chapters marked "not in syllabus" are absent from NTA's JEE Main 2026 syllabus; always check the latest NTA syllabus before skipping a chapter.