NEET Chemistry Some Basic Concepts of Chemistry PYQ Analysis 2020–2026: Topic-wise Trends & Practice
Some Basic Concepts of Chemistry (NEET Chemistry): 17 questions in 2020–2026, 4.3% of the subject. Topic-wise trends, difficulty split, repeated topics and PYQ practice.
Edurack Team
October 13, 2026
Some Basic Concepts of Chemistry gave 17 of the 398 NEET Chemistry questions asked between 2020 and 2026 (Re-NEET 2026 included). That is 4.3% of the subject and the #10 chapter out of 31 by weightage, about 2.1 questions per paper. It peaked at 3 in NEET 2023.
Of the 17 questions tagged for difficulty, 24% were easy, 41% medium and 35% hard, so this is a chapter that tends to bring the tougher questions.
It has been asked more often lately: 2.3 questions per paper across 2025, 2026 and Re-NEET 2026, against 1.3 per paper in 2020–2022.
Year-wise questions from Some Basic Concepts of Chemistry
| Paper | Questions |
|---|---|
| NEET 2020 | 1 |
| NEET 2021 | 1 |
| NEET 2022 | 2 |
| NEET 2023 | 3 |
| NEET 2024 | 3 |
| NEET 2025 | 2 |
| NEET 2026 | 2 |
| Re-NEET 2026 | 3 |
Difficulty split
| Level | Questions | Share |
|---|---|---|
| Easy | 4 | 24% |
| Medium | 7 | 41% |
| Hard | 6 | 35% |
Topic-wise analysis
Every topic tagged under Some Basic Concepts of Chemistry, most-asked first. "Papers" is the number of the 8 papers in which the topic appeared.
| Topic | Total Qs | Easy | Medium | Hard | Papers | Asked in |
|---|---|---|---|---|---|---|
| Stoichiometry and Stoichiometric Calculations (Limiting Reagent) | 5 | 1 | 2 | 2 | 4 | 2022, 2023, 2026 and Re-NEET 2026 |
| Empirical and Molecular formula | 2 | 0 | 2 | 0 | 2 | 2021 and 2024 |
| Mole Concept and Molar Masses (Mole Concept) | 2 | 0 | 1 | 1 | 2 | 2025 and 2026 |
| Atoms and Molecules | 1 | 0 | 0 | 1 | 1 | 2020 |
| Concentration Terms & Application (Molality (m)) | 1 | 1 | 0 | 0 | 1 | 2022 |
| Dalton's Atomic Theory | 1 | 1 | 0 | 0 | 1 | 2025 |
| Formula Mass | 1 | 1 | 0 | 0 | 1 | Re-NEET 2026 |
| Miscellaneous (Other Gas Equations) | 1 | 0 | 0 | 1 | 1 | 2023 |
| Mole | 1 | 0 | 1 | 0 | 1 | 2024 |
| Titration (Simple Titration) | 1 | 0 | 0 | 1 | 1 | 2024 |
| Uncertainty in Measurement (Significant Figures) r– | 1 | 0 | 1 | 0 | 1 | Re-NEET 2026 |
Which topics matter most
Most-tested topics
- Stoichiometry and Stoichiometric Calculations (Limiting Reagent): 5 Qs
- Empirical and Molecular formula: 2 Qs
- Mole Concept and Molar Masses (Mole Concept): 2 Qs
- Atoms and Molecules: 1 Q
- Concentration Terms & Application (Molality (m)): 1 Q
Topics that keep coming back
These appeared in three or more different papers:
- Stoichiometry and Stoichiometric Calculations (Limiting Reagent): 4 papers (2022, 2023, 2026 and Re-NEET 2026)
What the latest papers asked
Topics from NEET 2026 and Re-NEET 2026:
- Stoichiometry and Stoichiometric Calculations (Limiting Reagent)
- Mole Concept and Molar Masses (Mole Concept)
- Formula Mass
- Uncertainty in Measurement (Significant Figures) r–
Where the hard questions came from
- Stoichiometry and Stoichiometric Calculations (Limiting Reagent): 2 hard of 5
- Mole Concept and Molar Masses (Mole Concept): 1 hard of 2
- Atoms and Molecules: 1 hard of 1
- Miscellaneous (Other Gas Equations): 1 hard of 1
- Titration (Simple Titration): 1 hard of 1
How to use this data
- Start with the 1 recurring topic above. They account for 5 of the chapter's 17 questions (29%).
- 35% were hard. After the basics, practise multi-step and application questions from the hard-tagged topics.
- Re-solve the 4 topics from NEET 2026 and Re-NEET 2026, since they show the current style of questions.
- Then attempt the chapter's past questions under a timer and note which topics cost you marks.
Practise Some Basic Concepts of Chemistry PYQs
Solve every Some Basic Concepts of Chemistry question from 2020–2026 with solutions on Edurack:
- Practise Some Basic Concepts of Chemistry PYQs
- See the full Some Basic Concepts of Chemistry blueprint page
- NEET Chemistry PYQ analysis: all chapters
Related chapters
- Amines: #9 in Chemistry, 18 questions
- Thermodynamics: #11 in Chemistry, 16 questions
Frequently Asked Questions
How many questions came from Some Basic Concepts of Chemistry in NEET 2020–2026?
Some Basic Concepts of Chemistry contributed 17 NEET Chemistry questions across the 8 papers from 2020–2026, which is 4.3% of the subject.
Which topics of Some Basic Concepts of Chemistry are asked most often?
The most-tested topics are Stoichiometry and Stoichiometric Calculations (Limiting Reagent): 5 Qs, Empirical and Molecular formula: 2 Qs and Mole Concept and Molar Masses (Mole Concept): 2 Qs.
Is Some Basic Concepts of Chemistry easy or difficult in NEET?
Of 17 difficulty-tagged questions, 24% were easy, 41% medium and 35% hard.
Was Some Basic Concepts of Chemistry asked in NEET 2026?
Yes. It had 2 questions in NEET 2026 and 3 questions in Re-NEET 2026.