The 11th CBSE chemistry book PDF is not one file: NCERT prints Class 11 Chemistry as two textbooks, Chemistry Part I and Chemistry Part II, and both are linked below. The two books carry all nine chapters of the rationalised Class 11 Chemistry course for the 2025-26 academic session.
The split matters because a chapter number alone does not tell you which book to open. Chapters 1 to 6 sit in Chemistry Part I (pages 1-220); chapters 7 to 9 sit in Chemistry Part II (pages 235-327). Even Redox Reactions — a physical chemistry topic — opens Part II.
The sections below give the quick checks, what each book contains, and the official PDFs for both.
The two NCERT Class 11 Chemistry books at a glance
The table below shows both books with their chapter ranges, page spans and printed-page counts — the row your chapter falls in is the book you need.
| Book | Chapters | Printed pages | Book page |
|---|---|---|---|
| Chemistry Part I | 6 | 220 | Chemistry Part I (coming soon) |
| Chemistry Part II | 3 | 93 | Chemistry Part II (coming soon) |
How to use the Class 11 CBSE Chemistry book PDF
Not sure which book your chapter is in? Run three quick checks before you open a PDF.
- By chapter number: chapters 1 to 6 sit in Chemistry Part I; chapters 7 to 9 sit in Chemistry Part II.
- By topic: mole concept, atomic structure, periodic classification, chemical bonding, thermodynamics and equilibrium — Part I; redox reactions, organic chemistry and hydrocarbons — Part II.
- By what the teacher called it: if the assignment says “organic chemistry” or “hydrocarbons”, it always means Part II.
The surprise placement: Redox Reactions is chapter 7, pages 235-255, and it opens Chemistry Part II even though redox is physical chemistry (NCERT, p. 235). A homework line that says “chapter 7” points to the second book, and this is the most common misdirection for Class 11 students.
Edition check: the current rationalised Class 11 Chemistry set is exactly nine chapters. If your assignment names a chapter outside these nine, the book in your hand is an older edition. You can confirm you are on the official edition by opening the first chapter of Part I at ncert.nic.in/textbook/pdf/kech101.pdf.
The file names themselves are a check: on ncert.nic.in every Part I chapter file begins with “kech1” and every Part II chapter file begins with “kech2”, so a downloaded file can be matched against the official edition.
Syllabus check: textbook contents and the examinable syllabus are not always identical. The course is printed across both books, but check the current official CBSE syllabus for what is examinable this year.
Reading order: Part I first. Its bonding, hybridisation and equilibrium ideas are exactly what the organic chapters in Part II assume, so the intended sequence runs Part I first, then Part II.
What Chemistry Part I and Part II each cover
Chemistry Part I carries the physical and theoretical foundations: measurement and the mole, the structure of the atom, periodic classification, chemical bonding, thermodynamics and equilibrium. It runs to 6 chapters across pages 1-220 (NCERT, pp. 1-220), with 161 named sections, 73 verified numbered figures indexed from the textbook, and 218 exercise questions.
If you are revising mole calculations, hybridisation or pH, you are working inside Part I.
Chemistry Part II opens with redox reactions, then moves into the organic block: basic principles and techniques, followed by hydrocarbons. It runs to 3 chapters across pages 235-327 (NCERT, pp. 235-327), with 76 named sections, 24 verified numbered figures indexed from the textbook, and 48 exercise questions.
Nomenclature, reaction mechanisms, purification methods and the chemistry of alkanes, alkenes, alkynes and benzene all live here.
Together the two books reconcile to 313 printed pages, 237 named sections, 97 verified numbered figures and 266 exercise questions.
Related pages: the Class 11 hub and the NCERT books index
For the wider picture, the Class 11 hub lists the NCERT subjects this site indexes for Class 11, and the NCERT books index covers the books this site indexes across all classes. The links into the two Chemistry books themselves are in the table at the top of this page.
Sources and data verification
- Where the figures come from: the NCERT Class 11 Chemistry Part I and Part II textbook editions this site indexes, read from the official PDFs on ncert.nic.in.
- What this page covers, and what it does not: it covers the nine chapters of the two textbooks — page spans, named syllabus sections, verified numbered figures and exercise questions. It does not cover NCERT lab manuals, exemplar problems, or the CBSE syllabus.
- Academic session: this listing is maintained for the 2026-27 academic session.
- Which authority settles what: NCERT settles textbook editions, chapters and official PDFs; CBSE settles curriculum, syllabus and examinations. For a textbook edition, the official PDFs on ncert.nic.in are the authority.
Reference: NCERT Class 11 Chemistry textbooks, official editions on ncert.nic.in.
Class 11 Chemistry books: common questions
How many NCERT books are there for Class 11 Chemistry?
Two: Chemistry Part I and Chemistry Part II. Part I holds chapters 1 to 6 and Part II holds chapters 7 to 9, so you need both across the year.
Which book is Redox Reactions in — Part I or Part II?
Part II. Redox Reactions is chapter 7, pages 235-255 (NCERT, pp. 235-255), and it is the opening chapter of Chemistry Part II. It is physical chemistry, but NCERT starts the second book with it — which is exactly why students reach for the wrong book.
Are the Class 11 Chemistry PDFs on ncert.nic.in free and official?
Yes. NCERT publishes both textbooks as free official PDFs. Every Part I chapter file begins with “kech1” and every Part II chapter file begins with “kech2”, so a downloaded file can be checked against the official edition. The Redox Reactions PDF that opens Part II, for instance, is at ncert.nic.in/textbook/pdf/kech201.pdf.
My teacher assigned Hydrocarbons — which book do I open?
Chemistry Part II. Hydrocarbons is chapter 9, pages 295-327 (NCERT, p. 295), the final chapter of the second book. “Hydrocarbons” or “organic chemistry” on an assignment always means Part II.
Do these two books cover the whole Class 11 Chemistry syllabus?
The course is printed across both books — nine chapters in total. But textbook contents and the examinable syllabus are not always identical, so check the current official CBSE syllabus for what is examinable in your session.