The 2026-27 NCERT retains Chapter 3 Chemical Kinetics with all five main sections covering rate of reaction, factors affecting rate, integrated rate equations, pseudo-first-order reactions, and the Arrhenius equation. The chapter is one of the most scoring units of the Physical Chemistry block. This page hosts the latest NCERT Book PDF and a complete reading map.
- CBSE Weightage: 6 to 8 marks (usually one 3-mark numerical plus one short concept question)
- JEE Main Weightage: 3 to 4% (2 to 3 questions per shift, mostly numerical-value type)
- NEET Weightage: 2 to 3 questions per year
The PDF above is the full official NCERT print for Chapter 3 of the Class 12 Chemistry Part-I book. The reading map and rationalisation notes further down will help you decide which sections to study deeply and which to skim for the 2026 Boards.
This NCERT Book PDF is sourced from the official NCERT 2026-27 edition and cross-verified against the CBSE Class 12 Chemistry syllabus document released for the 2026 Board exam.
Also Check:
- Class 12 Chemistry Chapter 2 Electrochemistry NCERT Book PDF
- Class 12 Chemistry Chapter 4 The d- and f-Block Elements NCERT Book PDF
- CBSE Class 12 Chemistry Syllabus 2026-27
Chemical Kinetics Weightage Compared Across Class 12 Chemistry Chapters
The visual below maps the typical CBSE Board marks distribution across all 10 chapters of the current 2026-27 NCERT Class 12 Chemistry book, averaged over the last five board papers. Chemical Kinetics sits comfortably in the upper half, with only Solutions and Coordination Compounds carrying more marks.
Chemical Kinetics Video Chapter Walkthrough
Source: Magnet Brains on YouTube
How will Collegedunia's NCERT Book PDF Help You with Chemical Kinetics?
The official NCERT print is the single source of truth for CBSE Boards, and this page wraps it with the navigation aids that the PDF itself does not carry.
- 2026-27 NCERT Alignment: The PDF here is the latest NCERT print, with every change from the previous edition flagged in the rationalisation section below.
- Section Map with Page Ranges: The breakdown table further down lets you jump straight to the section you need without scrolling through 30 pages.
- Reading Sequence: The skim-then-deep-dive plan tells you which sections to read first and which intext examples are non-negotiable for Boards.
- Cross-Reference to Companion Resources: Every page in the PDF is mapped to the matching Collegedunia Notes, Formula Sheet, and NCERT Solutions for that sub-topic.
Chemical Kinetics NCERT Intext Examples and Their Sub-Topics
The 2026-27 print of Chapter 3 carries 10 solved intext examples spread across roughly 20 pages of prose. Each example demonstrates a specific kinetics skill that recurs in CBSE numericals. The table tags every example with the sub-topic it tests and the skill expected in the answer.
| Example | Sub-topic | Skill tested |
|---|---|---|
| 3.1 | Rate expression for N2 + 3H2 → 2NH3 | Write balanced rate in terms of every species |
| 3.2 | Average rate calculation from concentration-time data | Apply Δ[R]/Δt with stoichiometry |
| 3.3 | Rate of decomposition of N2O5 | Convert rate of one species to rate of another |
| 3.4 | Order of reaction from rate-law expression | Sum of exponents of concentration terms |
| 3.5 | Units of rate constant (zero, first, second order) | Dimensional reasoning for k |
| 3.6 | Initial-rate method to find order | Compare rates at different initial concentrations |
| 3.7 | Integrated first-order rate equation | Use k = 2.303t log [R]0[R] |
| 3.8 | Half-life of a first-order reaction | Apply t1/2 = 0.693k |
| 3.9 | Activation energy from Arrhenius plot | Slope of ln k vs 1/T graph |
| 3.10 | Effect of temperature on rate constant | Two-temperature Arrhenius form |
Chemical Kinetics NCERT Book: Section-by-Section Breakdown with Page Numbers
The chapter has five top-level sections plus a summary, and the table below maps each to its approximate page range and one-line content scope. Sections 3.3 and 3.5 together account for more than half of all CBSE numericals from this chapter.
| Section | Title | Pages | What it covers |
|---|---|---|---|
| 3.1 | Rate of a Chemical Reaction | 1-4 | Average and instantaneous rate, rate in terms of reactant and product, units |
| 3.2 | Factors Influencing Rate of a Reaction | 4-9 | Concentration dependence, rate law, order, molecularity, units of rate constant |
| 3.3 | Integrated Rate Equations | 9-17 | Zero-order and first-order integrated forms, half-life, graphical analysis |
| 3.4 | Pseudo First Order Reaction | 17-19 | Acid hydrolysis of ester and inversion of cane sugar as examples |
| 3.5 | Temperature Dependence of the Rate of a Reaction | 19-26 | Arrhenius equation, activation energy, effect of catalyst, collision theory |
| - | Summary, Exercises (30 Qs) | 26-30 | End-of-chapter problems for board-level practice |
The 30 end-of-chapter exercises split roughly into 10 conceptual short-answer items, 15 numerical questions, and 5 graphical/data-interpretation problems. The numerical block is the one that has shown up most reliably in CBSE Boards.
How to Read Chemical Kinetics from the NCERT Class 12 Chemistry Book
The PDF rewards a three-pass reading rather than a single linear read. Most students who finish the chapter in one sitting forget the integrated forms within a week.
- Pass 1 — Skim (45 minutes): Read only the section headings, the summary on page 26, and the boxed formulae. The goal is to know what's in the chapter, not to solve anything.
- Pass 2 — Deep read (3 to 4 hours): Read sections 3.1 to 3.5 in order, derive the integrated rate equations on paper as you go, and solve every intext example without looking at the answer first.
- Pass 3 — Practice (2 to 3 hours): Attempt the 30 end-of-chapter exercises. Use the worked Collegedunia NCERT Solutions only after a genuine attempt.
Chemical Kinetics Top 5 Formulae for Quick Recall
These five expressions cover almost every CBSE Board numerical and most JEE Main questions from the chapter. The complete master table with dimensional checks and "when to use which" decision tree lives on the dedicated Collegedunia Formula Sheet.
| Quantity | Formula |
|---|---|
| Average rate | rate = -1aΔ[A]Δ t = 1bΔ[B]Δ t |
| First-order integrated rate equation | k = 2.303t log [R]0[R] |
| First-order half-life | t1/2 = 0.693k |
| Zero-order rate constant | k = [R]0 - [R]t |
| Arrhenius equation | k = A e-Ea / RT |
Full master table: Chemical Kinetics Class 12 Chemistry Formula Sheet
What Changed in Chemical Kinetics for 2026-27 NCERT (Rationalisation Note)
The 2026-27 NCERT Class 12 Chemistry Part-I retains Chemical Kinetics, but a few sub-topics from the older 2022 print were trimmed when the syllabus was revised. Knowing what stayed and what went is the cheapest way to avoid wasted study time.
| Sub-topic | Status in 2026-27 | Notes |
|---|---|---|
| Rate of reaction (average and instantaneous) | Kept | Core section, unchanged |
| Rate law and order of reaction | Kept | Core section, unchanged |
| Integrated rate equations (zero, first order) | Kept | Core section, unchanged |
| Pseudo first-order reactions | Kept | Two textbook examples retained |
| Arrhenius equation, activation energy | Kept | Core section, unchanged |
| Collision theory of chemical reactions | Removed | Dropped in the current edition; do not study from older prints |
| Effect of catalyst (detailed) | Trimmed | Now a one-paragraph mention, no separate sub-section |
Students using the older 2022 NCERT print are studying close to 4 extra pages of removed content. The PDF on this page is the latest official 2026-27 NCERT.
Class 12th Chemistry Chemical Kinetics Multi-Day Study Plan
A three-day plan spreads the chapter so each integrated rate equation is practised at least twice before the chapter is closed. The third day is reserved for the Arrhenius numericals, which carry the highest mark-per-minute return in this unit.
| Day | What to read | What to practise | Time |
|---|---|---|---|
| Day 1 | Sections 3.1 and 3.2 (rate, rate law, order) | Intext examples 3.1 to 3.6 plus exercises 3.1 to 3.10 | 3 hours |
| Day 2 | Sections 3.3 and 3.4 (integrated rate, pseudo first-order) | Intext examples 3.7 and 3.8 plus exercises 3.11 to 3.22 | 3 hours |
| Day 3 | Section 3.5 (Arrhenius, activation energy) | Intext examples 3.9 and 3.10 plus exercises 3.23 to 3.30, then full revision | 2.5 hours |
Chemical Kinetics PYQ Trend in CBSE, JEE Main and NEET (2026 to 2021)
The three most repeated question types from this chapter in the last five years are: integrated first-order numericals, half-life calculations, and Arrhenius two-temperature problems. The mini-table below maps the topic most frequently asked each year; the full year-wise question map sits on the NCERT Solutions page.
| Year | CBSE Board | JEE Main | NEET |
|---|---|---|---|
| 2026 | First-order half-life numerical (3 marks) | Pseudo first-order, 2 questions | Pending (exam rescheduled) |
| 2025 | Arrhenius two-temperature (3 marks) | Order from initial rate, 2 questions | Rate law and order, 2 questions |
| 2024 | Derive first-order integrated rate (3 marks) | Activation energy from graph, 1 question | Half-life numerical, 1 question |
| 2023 | Zero-order numerical (2 marks) | - | Arrhenius numerical, 2 questions |
| 2022 | Units of rate constant (1 mark) plus half-life numerical (3 marks) | Order of reaction, 2 questions | - |
| 2021 | - | - | - |
Full year-wise PYQ map: Chemical Kinetics Class 12 Chemistry NCERT Solutions
Author, Edition and Publisher Information for the Chemical Kinetics NCERT PDF
The PDF on this page is taken from the official publication, not a third-party reprint. Always study from the latest print because the rationalisation changes are not back-ported to older copies.
- Book: Chemistry Part-I, Class 12 (Textbook for Class XII)
- Chapter: 3 — Chemical Kinetics
- Publisher: National Council of Educational Research and Training (NCERT)
- Edition: 2026-27 reprint (post-rationalisation)
- Total pages in the chapter: 30 pages including summary and exercises
- Language editions available: English, Hindi (Rasayan Vigyan Bhag-I)
If your school has issued a 2022 or earlier copy, request the latest reprint through the school office or use the official PDF on this Collegedunia page in parallel.
Related Links:
- Class 12 Chemistry NCERT Book PDF (All Chapters)
- CBSE Class 12 Chemistry Sample Papers 2026
- CBSE Class 12 Chemistry Previous Year Question Papers
More Chemical Kinetics Chemistry Class 12 Resources
- Chemical Kinetics Class 12 Chemistry NCERT Solutions
- Chemical Kinetics Class 12 Chemistry Notes
- Chemical Kinetics Class 12 Chemistry Formula Sheet
- Chemical Kinetics Class 12 Chemistry NCERT Exemplar Book PDF
- Chemical Kinetics Class 12 Chemistry NCERT Exemplar Solutions
- Chemical Kinetics Class 12 Chemistry Handwritten Notes
NCERT Book PDF for Class 12 Chemistry: All Chapters
The table lists every chapter of the Class 12 Chemistry 2026-27 NCERT, each linking to its dedicated Collegedunia NCERT Book PDF page.
| Chapter | Resource |
|---|---|
| Chapter 1 | Solutions NCERT Book PDF |
| Chapter 2 | Electrochemistry NCERT Book PDF |
| Chapter 4 | The d- and f-Block Elements NCERT Book PDF |
| Chapter 5 | Coordination Compounds NCERT Book PDF |
| Chapter 6 | Haloalkanes and Haloarenes NCERT Book PDF |
| Chapter 7 | Alcohols, Phenols and Ethers NCERT Book PDF |
| Chapter 8 | Aldehydes, Ketones and Carboxylic Acids NCERT Book PDF |
| Chapter 9 | Amines NCERT Book PDF |
| Chapter 10 | Biomolecules NCERT Book PDF |
Chemical Kinetics Class 12 Chemistry NCERT Book PDF FAQs
Ques. Where can I download the Class 12 Chemistry Chapter 3 Chemical Kinetics NCERT Book PDF?
Ans. You can download the Chemical Kinetics Class 12 Chemistry NCERT Book PDF directly from this page. Both the Normal and HD versions are available and both are free, with no registration required.
Ques. Is the Chemical Kinetics chapter aligned with the 2026-27 NCERT?
Ans. Yes. The PDF reflects the current 2026-27 syllabus for Class 12 Chemistry. The chapter retains all five core sections on rate of reaction, factors affecting rate, integrated rate equations, pseudo first-order reactions, and the Arrhenius equation; collision theory of reactions has been dropped from the new edition.
Ques. How many pages is the Class 12th Chemistry Chemical Kinetics NCERT Book PDF?
Ans. The chapter runs roughly 30 pages, including the 5 numbered sections, 10 intext examples, the summary, and the 30 end-of-chapter exercises.
Ques. How many marks does Chemical Kinetics carry in the CBSE Class 12 Chemistry Board exam?
Ans. Chemical Kinetics typically carries 6 to 8 marks in the Class 12 Chemistry Board exam. The marks are usually split as one 3-mark integrated-rate or Arrhenius numerical plus one short conceptual question on rate law or order of reaction.
Ques. Which intext examples in Chemical Kinetics are most important for Boards?
Ans. Examples 3.7 (first-order integrated rate equation), 3.8 (half-life), 3.9 (Arrhenius plot), and 3.10 (two-temperature Arrhenius form) are the highest-yield. Practise each at least twice before the exam.
Ques. Has any topic been removed from Chemical Kinetics in the latest NCERT edition?
Ans. Yes. The collision theory of chemical reactions, which appeared in the older 2022 print, has been removed in the current 2026-27 NCERT edition. The detailed effect-of-catalyst sub-section was also trimmed to a single paragraph.
Ques. How long should I take to complete the Chemical Kinetics NCERT chapter?
Ans. A three-day plan of about 8 to 9 hours total is realistic — one day for sections 3.1 and 3.2, one for sections 3.3 and 3.4, and one for section 3.5 plus full revision. The Collegedunia multi-day study plan further up on this page breaks the hours down section by section.
Comments