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Free, original, step-by-step NCERT Solutions for Class 11 Chemistry, matching the current 2026-27 CBSE syllabus.
Each chapter below is solved question by question, in the order it appears in the textbook, so you can follow along page by page instead of jumping between sites. Click a chapter's Solutions link for the full worked answers, Extra Questions for additional practice beyond the textbook, and Revision Notes for a quick summary before a test.
Chapter 1: Some Basic Concepts of Chemistry – Free PDF Download
Question: Calculate the molar mass of the following: (i) H2O (ii) CO2 (iii) CH4 Solution: Using atomic masses H = 1.008 u, C = 12.011 u, O = 16.00 u: (i) Molar mass of H2O = 2(1.008) + 16.00 = 2.016 + 16.00 = 18.016 ≈ 18.02 g mol−1 (ii) Molar mass of CO2 = 12.011 + 2(16.00) = 12.011 + 32.00 = 44.011 ≈ 44.01 g mol−1 ...
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Chapter 2: Structure of Atom – Free PDF Download
Question: (i) Calculate the number of electrons which will together weigh one gram.(ii) Calculate the mass and charge of one mole of electrons. Solution: (i) Mass of one electron = 9.10939 × 10-31 kg = 9.10939 × 10-28 g.Number of electrons in 1 g = 1 ÷ (9.10939 × 10-28) = 1.098 × 1027 electrons.(ii) Mass of 1 mole o...
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Chapter 3: Classification of Elements and Periodicity in Properties – Free PDF Download
Question: What is the basic theme of organisation in the periodic table? Solution: The basic theme of organisation of elements in the periodic table is the classification of elements on the basis of similarities in their properties so that the study of their properties becomes systematic and simple. Elements are arr...
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Chapter 4: Chemical Bonding and Molecular Structure – Free PDF Download
Question: Explain the formation of a chemical bond. Solution: A chemical bond is the force of attraction that holds two or more atoms or ions together in a molecule or compound. According to the Kossel-Lewis approach, atoms combine with each other to achieve a stable, noble-gas-like electronic configuration (octet) ...
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Chapter 5: Chemical Thermodynamics – Free PDF Download
Question: Choose the correct answer. A thermodynamic state function is a quantity (i) used to determine heat changes (ii) whose value is independent of path (iii) used to determine pressure volume work (iv) whose value depends on temperature only. Solution: The correct answer is (ii) whose value is independent of pa...
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Chapter 6: Equilibrium – Free PDF Download
Equilibrium is one of the most conceptually important chapters in the Class 11 Chemistry syllabus, explaining why reversible physical and chemical processes settle into a stable, dynamic balance rather than running to completion. It builds the foundation for the law of chemical equilibrium, equilibrium constants Kc ...
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Chapter 7: Redox Reactions – Free PDF Download
Redox Reactions is the first chapter of Part 2 of the NCERT Class 11 Chemistry textbook (2026-27 rationalised edition), and it builds the electron-transfer and oxidation-number toolkit that students will reuse throughout electrochemistry, p-block chemistry, and inorganic qualitative analysis in Class 12. The chapter...
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Chapter 8: Organic Chemistry - Some Basic Principles and Techniques – Free PDF Download
Chapter 8 of NCERT Class 11 Chemistry, Organic Chemistry: Some Basic Principles and Techniques, is the gateway chapter for everything you will study in organic chemistry across Classes 11 and 12. It explains how organic compounds are classified and named under the IUPAC system, works through the electronic effects —...
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Chapter 9: Hydrocarbons – Free PDF Download
Hydrocarbons is the ninth and final chapter of the NCERT Class 11 Chemistry textbook (Part 2) under the 2026-27 rationalised CBSE syllabus, coming right after Organic Chemistry -- Some Basic Principles and Techniques. It brings together everything you have learned about IUPAC nomenclature, isomerism and electron-mov...
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| Chapter | NCERT Solutions | Revision Notes | Extra Questions (HOTS) |
|---|---|---|---|
| Ch 1: Some Basic Concepts of Chemistry – Free PDF Download | Solutions | Revision Notes | Extra Questions |
| Ch 2: Structure of Atom – Free PDF Download | Solutions | Revision Notes | Extra Questions |
| Ch 3: Classification of Elements and Periodicity in Properties – Free PDF Download | Solutions | Revision Notes | Extra Questions |
| Ch 4: Chemical Bonding and Molecular Structure – Free PDF Download | Solutions | Revision Notes | Extra Questions |
| Ch 5: Chemical Thermodynamics – Free PDF Download | Solutions | Revision Notes | Extra Questions |
| Ch 6: Equilibrium – Free PDF Download | Solutions | Revision Notes | Extra Questions |
| Ch 7: Redox Reactions – Free PDF Download | Solutions | Revision Notes | Extra Questions |
| Ch 8: Organic Chemistry - Some Basic Principles and Techniques – Free PDF Download | Solutions | Revision Notes | Extra Questions |
| Ch 9: Hydrocarbons – Free PDF Download | Solutions | Revision Notes | Extra Questions |
Also see the Class 11 NCERT Books catalog for the official textbook PDF.
Frequently Asked Questions
Are these Class 11 Chemistry solutions updated for the 2026-27 syllabus?
Yes, every chapter listed above is checked against the current NCERT Chemistry textbook for the 2026-27 CBSE session.
Do you also have Extra Questions and Revision Notes for Class 11 Chemistry?
Yes — wherever published, Extra Questions and/or Revision Notes are linked next to the matching chapter above.
Are these Class 11 Chemistry NCERT Solutions available in Hindi medium?
Hindi-medium solutions for Class 11 Chemistry are being added progressively. In the meantime, this English-medium solution can be used alongside your Hindi-medium NCERT textbook, since the questions and chapter numbering are identical.