Executive Summary
Analysis of NEET Chemistry previous-year question frequency trends from 2017–2025 shows that some NCERT Chemistry chapters appeared more frequently than others in the analysed chapter-mapped dataset.
The analysed dataset contains 22 chapters and 362 chapter-mapped questions in total. The p-Block Elements has the highest total with 33 questions, followed by Chemical Bonding and Molecular Structure with 26 and Equilibrium with 25.
Other chapters in the Top-10 group include Coordination Compounds, Hydrocarbons, Alcohols, Phenols and Ethers, Organic Compounds Containing Nitrogen, Structure of Atom, Chemical Kinetics, Thermodynamics, and Aldehydes, Ketones and Carboxylic Acids.
The lowest totals in this dataset belong to Hydrogen, Redox Reactions, and Haloalkanes and Haloarenes.
The table below presents the year-wise question counts, total questions across 2017–2025, percentage share of chapter-mapped questions, and frequency rank.
These historical frequencies are useful for revision planning but should not be treated as predictions of the exact number of questions in a future NEET examination.
Chapter-wise Question Frequency
| Chapter (Class) | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 | Total | Share of Chapter-Mapped Counts | Rank |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Some Basic Concepts of Chemistry (XI) | 1 | 2 | 1 | 1 | 1 | 1 | 1 | 3 | 4 | 15 | 4.1% | 14 |
| Structure of Atom (XI) | 1 | 1 | 2 | 1 | 1 | 2 | 2 | 5 | 3 | 18 | 5.0% | 8 |
| Classification of Elements and Periodicity in Properties (XI) | 1 | 0 | 1 | 2 | 1 | 1 | 1 | 0 | 2 | 9 | 2.5% | 19 |
| Chemical Bonding and Molecular Structure (XI) | 4 | 2 | 4 | 2 | 3 | 2 | 4 | 4 | 1 | 26 | 7.2% | 2 |
| Thermodynamics (XI) | 2 | 1 | 2 | 2 | 3 | 1 | 2 | 3 | 1 | 17 | 4.7% | 10 |
| Equilibrium (XI) | 3 | 3 | 3 | 2 | 1 | 5 | 2 | 3 | 3 | 25 | 6.9% | 3 |
| Redox Reactions (XI) | 0 | 1 | 1 | 1 | 0 | 0 | 1 | 2 | 0 | 6 | 1.7% | 21 |
| Hydrogen (XI) | 0 | 0 | 1 | 0 | 1 | 0 | 1 | 0 | 1 | 4 | 1.1% | 22 |
| The s-Block Elements (XI) | 3 | 3 | 2 | 2 | 2 | 2 | 2 | 0 | 0 | 16 | 4.4% | 12 |
| The p-Block Elements (XI/XII) | 3 | 4 | 6 | 4 | 5 | 4 | 2 | 4 | 1 | 33 | 9.1% | 1 |
| Organic Chemistry — Some Basic Principles and Techniques (XI) | 3 | 2 | 2 | 1 | 1 | 2 | 3 | 2 | 0 | 16 | 4.4% | 12 |
| Hydrocarbons (XI) | 3 | 2 | 2 | 1 | 4 | 0 | 1 | 4 | 3 | 20 | 5.5% | 5 |
| Solutions (XII) | 1 | 0 | 2 | 2 | 2 | 0 | 1 | 2 | 3 | 13 | 3.6% | 16 |
| Electrochemistry (XII) | 1 | 1 | 2 | 2 | 2 | 3 | 1 | 2 | 1 | 15 | 4.1% | 14 |
| Chemical Kinetics (XII) | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 3 | 3 | 18 | 5.0% | 8 |
| The d- and f-Block Elements (XII) | 2 | 2 | 0 | 1 | 2 | 2 | 1 | 2 | 1 | 13 | 3.6% | 16 |
| Coordination Compounds (XII) | 4 | 3 | 1 | 2 | 2 | 2 | 2 | 3 | 4 | 23 | 6.4% | 4 |
| Haloalkanes and Haloarenes (XII) | 0 | 0 | 0 | 2 | 1 | 1 | 1 | 2 | 1 | 8 | 2.2% | 20 |
| Alcohols, Phenols and Ethers (XII) | 3 | 4 | 1 | 2 | 1 | 3 | 3 | 3 | 0 | 20 | 5.5% | 5 |
| Aldehydes, Ketones and Carboxylic Acids (XII) | 2 | 1 | 0 | 2 | 3 | 4 | 1 | 0 | 4 | 17 | 4.7% | 10 |
| Organic Compounds Containing Nitrogen (XII) | 2 | 2 | 2 | 1 | 2 | 1 | 2 | 3 | 4 | 19 | 5.2% | 7 |
| Biomolecules (XII) | 1 | 2 | 1 | 2 | 1 | 0 | 1 | 1 | 2 | 11 | 3.0% | 18 |
← Swipe sideways to see all columns →
Note: The Total column is the sum of the 2017–2025 yearly counts. The Share represents each chapter's total divided by the final retained chapter-mapped total of 362 questions across the 22 chapters analysed. Chapters with equal totals share the same rank, and the next rank is skipped accordingly. The percentages describe the distribution within this analysed dataset and are not official NTA weightage percentages.
Top-10 High-Frequency Chapters
The top 10 chapters by rank in this dataset are: Chapters with equal totals share a rank, so the Top-10 group below contains 11 chapters (all chapters with rank 10 or better).
- The p-Block Elements — 33
- Chemical Bonding and Molecular Structure — 26
- Equilibrium — 25
- Coordination Compounds — 23
- Hydrocarbons — 20
- Alcohols, Phenols and Ethers — 20
- Organic Compounds Containing Nitrogen — 19
- Structure of Atom — 18
- Chemical Kinetics — 18
- Thermodynamics — 17
- Aldehydes, Ketones and Carboxylic Acids — 17
Together, these 11 chapters account for approximately 65.2% of the chapter-mapped questions in the analysed dataset (236 of 362).
These chapters historically appeared more frequently in this analysed dataset and can be treated as higher-priority revision areas, while still covering the complete syllabus.
Bottom-10 Low-Frequency Chapters
The lowest-total chapters in the analysed table are: Chapters with equal totals share a rank, so this group contains 11 chapters (all chapters tied at or below the 10th-lowest total of 16).
- Hydrogen — 4
- Redox Reactions — 6
- Haloalkanes and Haloarenes — 8
- Classification of Elements and Periodicity in Properties — 9
- Biomolecules — 11
- The d- and f-Block Elements — 13
- Solutions — 13
- Electrochemistry — 15
- Some Basic Concepts of Chemistry — 15
- Organic Chemistry — Some Basic Principles and Techniques — 16
- The s-Block Elements — 16
Together, these 11 chapters account for approximately 34.8% of the chapter-mapped questions in the analysed dataset (126 of 362).
Important: Low historical frequency does not mean that a chapter can be safely skipped, and it does not guarantee fewer questions in future examinations. NEET can change its question distribution from year to year.
Trends in High-Frequency Chapters
The following trend chart represents the yearly question counts for the six highest-total chapters from 2017–2025.
Trend Chart data
| NEET Exam Year | The p-Block Elements | Chemical Bonding and Molecular Structure | Equilibrium | Coordination Compounds | Hydrocarbons | Alcohols, Phenols and Ethers |
|---|---|---|---|---|---|---|
| 2017 | 3 | 4 | 3 | 4 | 3 | 3 |
| 2018 | 4 | 2 | 3 | 3 | 2 | 4 |
| 2019 | 6 | 4 | 3 | 1 | 2 | 1 |
| 2020 | 4 | 2 | 2 | 2 | 1 | 2 |
| 2021 | 5 | 3 | 1 | 2 | 4 | 1 |
| 2022 | 4 | 2 | 5 | 2 | 0 | 3 |
| 2023 | 2 | 4 | 2 | 2 | 1 | 3 |
| 2024 | 4 | 4 | 3 | 3 | 4 | 3 |
| 2025 | 1 | 1 | 3 | 4 | 3 | 0 |
Mermaid chart source
graph TD
subgraph NEET_Year[NEET Exam Year]
Y2017((2017)) --> "The p-Block Elements:3"
Y2017 --> "Chemical Bonding and Molecular Structure:4"
Y2017 --> "Equilibrium:3"
Y2017 --> "Coordination Compounds:4"
Y2017 --> "Hydrocarbons:3"
Y2017 --> "Alcohols, Phenols and Ethers:3"
Y2018((2018)) --> "The p-Block Elements:4"
Y2018 --> "Chemical Bonding and Molecular Structure:2"
Y2018 --> "Equilibrium:3"
Y2018 --> "Coordination Compounds:3"
Y2018 --> "Hydrocarbons:2"
Y2018 --> "Alcohols, Phenols and Ethers:4"
Y2019((2019)) --> "The p-Block Elements:6"
Y2019 --> "Chemical Bonding and Molecular Structure:4"
Y2019 --> "Equilibrium:3"
Y2019 --> "Coordination Compounds:1"
Y2019 --> "Hydrocarbons:2"
Y2019 --> "Alcohols, Phenols and Ethers:1"
Y2020((2020)) --> "The p-Block Elements:4"
Y2020 --> "Chemical Bonding and Molecular Structure:2"
Y2020 --> "Equilibrium:2"
Y2020 --> "Coordination Compounds:2"
Y2020 --> "Hydrocarbons:1"
Y2020 --> "Alcohols, Phenols and Ethers:2"
Y2021((2021)) --> "The p-Block Elements:5"
Y2021 --> "Chemical Bonding and Molecular Structure:3"
Y2021 --> "Equilibrium:1"
Y2021 --> "Coordination Compounds:2"
Y2021 --> "Hydrocarbons:4"
Y2021 --> "Alcohols, Phenols and Ethers:1"
Y2022((2022)) --> "The p-Block Elements:4"
Y2022 --> "Chemical Bonding and Molecular Structure:2"
Y2022 --> "Equilibrium:5"
Y2022 --> "Coordination Compounds:2"
Y2022 --> "Hydrocarbons:0"
Y2022 --> "Alcohols, Phenols and Ethers:3"
Y2023((2023)) --> "The p-Block Elements:2"
Y2023 --> "Chemical Bonding and Molecular Structure:4"
Y2023 --> "Equilibrium:2"
Y2023 --> "Coordination Compounds:2"
Y2023 --> "Hydrocarbons:1"
Y2023 --> "Alcohols, Phenols and Ethers:3"
Y2024((2024)) --> "The p-Block Elements:4"
Y2024 --> "Chemical Bonding and Molecular Structure:4"
Y2024 --> "Equilibrium:3"
Y2024 --> "Coordination Compounds:3"
Y2024 --> "Hydrocarbons:4"
Y2024 --> "Alcohols, Phenols and Ethers:3"
Y2025((2025)) --> "The p-Block Elements:1"
Y2025 --> "Chemical Bonding and Molecular Structure:1"
Y2025 --> "Equilibrium:3"
Y2025 --> "Coordination Compounds:4"
Y2025 --> "Hydrocarbons:3"
Y2025 --> "Alcohols, Phenols and Ethers:0"
endThe chart shows how yearly counts for these chapters varied between individual exams. For example, The p-Block Elements reached its highest yearly count of 6 in 2019; Chemical Bonding and Molecular Structure reached its highest yearly count of 4 in 2017 and 2019 and 2023 and 2024; Equilibrium reached its highest yearly count of 5 in 2022.
These variations demonstrate why historical frequency should be used for revision prioritisation rather than exact prediction.
Revision Priorities
🔴 High Priority — Cover Thoroughly
These chapters historically appeared more frequently in this analysed dataset (the Top-10 group):
- The p-Block Elements
- Chemical Bonding and Molecular Structure
- Equilibrium
- Coordination Compounds
- Hydrocarbons
- Alcohols, Phenols and Ethers
- Organic Compounds Containing Nitrogen
- Structure of Atom
- Chemical Kinetics
- Thermodynamics
- Aldehydes, Ketones and Carboxylic Acids
🟡 Medium Priority — Build Strong Understanding
These chapters have mid-range totals in this dataset and should not be ignored:
- The s-Block Elements
- Organic Chemistry — Some Basic Principles and Techniques
- Some Basic Concepts of Chemistry
- Electrochemistry
- Solutions
- The d- and f-Block Elements
🟢 Lower Historical Frequency — Revise After Core Chapters
These five chapters had the lowest totals in this dataset, but they should not be skipped:
- Biomolecules
- Classification of Elements and Periodicity in Properties
- Haloalkanes and Haloarenes
- Redox Reactions
- Hydrogen
Overall Takeaway
The historical data suggests that some Chemistry chapters appear more often than others in this analysed dataset. Students preparing for NEET can use this information to prioritise revision, especially when time is limited.
However, NEET chapter-wise trends are not fixed rules. A chapter with a lower historical total can still contribute questions in a future examination, while a frequently tested chapter may receive fewer questions in a particular year.
Trend analysis should be used as a study-planning tool, not as a guarantee of future question distribution.
Methodology & Sources
Data Source: This analysis presents NEET Chemistry previous-year question frequency trends for the 2017–2025 period based on the provided historical chapter-wise reference dataset.
Chapter Mapping: Questions are grouped according to the relevant NCERT Chemistry chapter. Chapter-wise frequencies are intended to show historical question-frequency trends and revision priorities.
Important Note: Chapter-wise frequencies should be interpreted as trend indicators rather than predictions of the exact number of questions that will appear from a chapter in a future NEET examination. Past trends do not guarantee future question distribution. The examination pattern, syllabus and chapter distribution may change over time.
Official Reference: NEET question papers and answer keys released by the National Testing Agency (NTA) are used as the official examination reference.
Data Interpretation Note
The analysis covers NEET Chemistry examinations from 2017 through 2025. The yearly values are used to calculate each chapter's historical total.
Chapters excluded from this analysis are States of Matter: Gases and Liquids, Environmental Chemistry, The Solid State, Surface Chemistry, General Principles and Processes of Isolation of Elements, Polymers, and Chemistry in Everyday Life.
The p-Block Elements from the two reference sections are combined into one XI/XII category to avoid double-counting.
The percentage denominator is the sum of the final retained chapter totals in this analysis.
Final retained chapter-mapped total: 362 questions across 22 chapters.
Share = Chapter Total ÷ Final Retained Chapter-Mapped Total × 100.
These percentages represent the distribution within this analysed dataset and are not official NTA weightage percentages.
Important Disclaimer
This trend analysis is provided for educational and revision-planning purposes.
Historical question frequency can help students identify chapters that appeared more frequently in previous examinations, but no chapter is guaranteed to receive a particular number of questions in a future NEET examination.
Students should prepare according to the complete applicable NCERT syllabus and official NEET syllabus rather than relying only on historical frequency.
Trend analysis should be used as a study-planning tool, not as a guarantee of future question distribution.