NCERT Solutions for Class 11 Chemistry - Free PDF Download

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Class 11 Chemistry marks a significant shift from what you studied in middle school. Topics like Atomic Structure, Thermodynamics, Chemical Equilibrium, and Organic Chemistry Basics are introduced at a level that demands strong conceptual clarity — not just memorisation.

NCERT Solutions for Class 11 Chemistry are detailed, step-by-step answers to every question in the NCERT textbook, written according to CBSE marking guidelines. They help you:

• Understand exactly how to frame answers for maximum marks
• Identify the logic behind multi-step numerical problems
• Build the foundation you need for JEE Main, JEE Advanced, and NEET

The CBSE board frames question papers directly from NCERT textbooks. According to CBSE's official curriculum documents, students who thoroughly practise NCERT exercises consistently outperform those who rely solely on reference books.

These solutions are prepared by eSaral's Chemistry faculty — teachers with IIT Bombay backgrounds, including verified All India Ranks — so the approach mirrors what top-performing students actually use.

Also explore: NCERT Solutions for Class 11 Maths and NCERT Solutions for Class 11 Physics to cover your full PCM preparation.

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Unit-wise (Unit-Wise) NCERT Solutions for Class 11 Chemistry (2026-27)

The following 9 units are part of the current NCERT Class 11 Chemistry syllabus for 2026-27 as updated by CBSE:

⚠️ Note on Deleted Units: The following chapters have been removed from the NCERT Class 11 Chemistry syllabus for 2023-24, 2024-25, and 2026-27: States of Matter, Hydrogen, The s-Block Elements, The p-Block Elements, and Environmental Chemistry. Do not include these in your board exam preparation.

Also download the NCERT Class 11 book PDF here

NCERT Solutions Class 11 Chemistry Unit Details (2026–27 Syllabus)

Unit 1: Some Basic Concepts of Chemistry

(7 Marks)

This Unit explains the importance of chemistry, molecular mass, and atomic mass. Fundamental theories and laws such as Avogadro's Law, Dalton's Atomic Theory, and the Law of Conservation of Mass are briefly explained here. You'll also find problems based on determining the molecular weight of compounds, mass per cent, and concentration. This Unit gives you a clear understanding of empirical and molecular formulas, molarity, molality, and the mole concept.

Topics Covered in This Unit

• General Introduction: Importance and scope of chemistry
• Historical approach to particulate nature of matter, Dalton's atomic theory — concept of atoms, elements, and molecules
• Laws of chemical combination
• Molecular and atomic masses
• Molar mass and mole concept
• Percentage composition and empirical and molecular formula
• Chemical reactions, stoichiometry, and calculations based on stoichiometry

Unit 2: Structure of Atom

(9 Marks)

In this Unit, you'll be introduced to Thomson's atomic model, subatomic particles, Bohr's model, Rutherford's atomic model, and the quantum mechanical model of the atom. It includes problems on the relationship between frequency and wavelength, energy associated with electromagnetic radiation, and subatomic particles. You'll also learn how to write electron configurations and transitions in different shells, which is important for exams.

Topics Covered in This Unit

• Discovery of electrons, protons, and neutrons; atomic number, isotopes, and isobars
• Rutherford's model and limitations, Thomson's model and limitations, Bohr's model and limitations
• Concept of shells and subshells
• Dual nature of light and matter, de Broglie's relationship, Heisenberg uncertainty principle
• Concept of orbitals, quantum numbers, shapes of s, p, and d orbitals
• Rules of filling electrons in orbitals — Aufbau principle, Pauli exclusion principle, Hund's rule
• Electronic configuration of atoms, stability of half-filled and fully-filled orbitals

Unit 3: Classification of Elements and Periodicity in Properties

(6 Marks)

Classification of elements is important from the exam's point of view, with multiple questions asked in both board and competitive exams. You'll learn about s-block, p-block, d-block, and f-block elements from the periodic table, along with physical and chemical properties and chemical reactivity trends.

Topics Covered in This Unit

• Brief history of the development of the periodic table
• Significance of classification
• Present form of the periodic table and modern periodic law
• Periodic trends in properties of elements — atomic radii, ionic radii, noble gas radii, ionisation enthalpy, electron gain enthalpy, electronegativity, and valence

Unit 4: Chemical Bonding and Molecular Structure

(7 Marks)

This Unit covers VSEPR Theory, Lewis structures, Valence Bond Theory, polar character of covalent bonds, and hydrogen bonding. You'll learn how to draw Lewis dot symbols for molecules, atoms, and polyatomic ions.

Topics Covered in This Unit

• Ionic bond, valence electrons, covalent bond, bond parameters
• Lewis structure, polar character of covalent bond, covalent character of ionic bond
• Resonance, geometry of covalent molecules
• Valence bond theory, VSEPR theory
• Concept of hybridization involving s, p, and d orbitals and shapes of some simple molecules
• Molecular orbital theory of homonuclear diatomic molecules (qualitative idea only)
• Hydrogen bond

Unit 5: Chemical Thermodynamics

(9 Marks)

Thermodynamics explains the relation between heat and other energy forms. Based on exchange of matter and energy, thermodynamic systems are divided into three types — open, closed, and isolated systems. You'll learn concepts like calorimetry, enthalpies, spontaneity, and Gibbs energy change.

Topics Covered in This Unit

• Concepts of system, types of systems, surroundings, heat, work, energy, extensive and intensive properties, and state functions
• First law of thermodynamics — internal energy and enthalpy, heat capacity and specific heat, measurement of ΔU and ΔH
• Hess's law of constant heat summation
• Enthalpy of bond dissociation, combustion, formation, atomization, sublimation, phase transition, dilution, and ionisation
• Introduction of entropy as a state function
• Free energy change for spontaneous and non-spontaneous processes and equilibrium

Unit 6: Equilibrium

(7 Marks)

This Unit covers buffer solutions, equilibrium constant, and the common ion effect. A thorough understanding of each concept here is important to perform well in your final exam.

Topics Covered in This Unit

• Equilibrium in physical and chemical processes, dynamic nature of equilibrium
• Law of mass action, equilibrium constant
• Factors affecting equilibrium — Le Chatelier's principle
• Ionic equilibrium — ionisation of acids and bases, strong and weak electrolytes, degree of ionisation, concept of pH
• Hydrolysis of salts (elementary idea)
• Solubility product, buffer solutions, common ion effect (with illustrative examples)

Unit 7: Redox Reactions

(4 Marks)

Redox reactions form the basis of electrochemistry. You'll get questions based on the classical idea of redox reactions, redox reactions in terms of electron transfer, oxidation number, and electrode processes.

Topics Covered in This Unit

• Concept of oxidation and reduction
• Redox reactions
• Oxidation number
• Balancing redox reactions
• Applications of redox reactions

Unit 8: Organic Chemistry – Some Basic Principles and Techniques

(11 Marks)

This Unit introduces the fundamentals of organic chemistry, focusing on the structure, classification, and nomenclature of organic compounds. It covers functional groups, types of isomerism, homologous series, and the methods of preparation, purification, and analysis of organic compounds — forming the foundation for every organic chapter that follows.

Topics Covered in This Unit

• Tetravalence of carbon; shapes of organic compounds
• General introduction, methods of purification, qualitative and quantitative analysis
• Classification and IUPAC nomenclature of organic compounds
• Electronic displacement in a covalent bond — inductive effect, electromeric effect, resonance, and hyperconjugation
• Homolytic and heterolytic fission of a covalent bond
• Free radicals, carbocations, and carbanions
• Electrophiles and nucleophiles
• Types of organic reactions

Unit 9: Hydrocarbons

(10 Marks)

The study of properties, structure, reactions, composition, and synthesis of organic compounds is called organic chemistry, and this Unit builds directly on Unit 8. It covers alkanes, alkenes, alkynes, and aromatic hydrocarbons, along with their preparation and reaction mechanisms. This Unit is important from the exam point of view — concentrate on all concepts and mechanisms to perform well.

Topics Covered in This Unit

• Classification of hydrocarbons
• Alkanes: IUPAC nomenclature, isomerism, conformations (ethane only), physical properties, chemical reactions, free radical mechanism of halogenation, combustion, and pyrolysis
• Alkenes: IUPAC nomenclature, structure of double bond (ethene), geometrical isomerism, physical properties, methods of preparation; chemical reactions — addition of hydrogen, water, halogen, hydrogen halides (Markovnikov's addition and peroxide effect), ozonolysis, oxidation, mechanism of electrophilic addition
• Alkynes: IUPAC nomenclature, structure of triple bond (ethyne), physical properties, methods of preparation, chemical reactions — acidic character of alkynes, addition reactions of hydrogen, hydrogen halides, halogens, and water
• Aromatic hydrocarbons: Introduction, IUPAC nomenclature; benzene — resonance, aromaticity; chemical properties — mechanism of electrophilic substitution (halogenation, nitration, sulphonation, Friedel-Crafts alkylation and acylation); directive influence of functional group in mono-substituted benzene; carcinogenicity and toxicity

CBSE Marks Weightage and JEE Relevance: Unit-Wise Breakdown (2026-27)

Use this table to prioritise your study time based on the marks potential in both CBSE Board Exams and JEE Main:

Note: Chemical Bonding, Thermodynamics, and Equilibrium together contribute the highest weightage in both CBSE Board Exams and JEE Main. Students should prioritise these Units for maximum score improvement.

How Do NCERT Solutions Help You Score Higher in Board Exams? 

Are NCERT Solutions Enough for Class 11 Chemistry Board Exams?

For CBSE board exams, NCERT solutions alone cover approximately 85–90% of what you need. The board directly draws questions from NCERT exercises, examples, and in-text questions. Students who solve every NCERT question and understand the solution methodology rarely score below 85%.

For JEE Main and JEE Advanced, NCERT forms the base — but additional practice with previous year papers and advanced problem sets is essential. eSaral's structured JEE Chemistry modules are built on top of NCERT foundations, using the same step-by-step approach developed by faculty who have themselves cleared JEE with ranks like AIR-41.

What Makes a Good NCERT Solution?

Not all solutions available online follow CBSE's answer-writing conventions. A reliable NCERT solution should:

• Match the CBSE marking scheme — steps should be shown exactly as a board examiner expects
• Use clear, simple language — if you cannot explain it to a classmate, the solution is too complex
• Include diagrams where relevant — especially for Units like Chemical Bonding and Hydrocarbons
• Flag common mistakes — good solutions point out where students typically lose marks

eSaral's solutions are prepared to these standards and verified against the latest CBSE syllabus. You can also browse the full library at NCERT Solutions – All Classes and Subjects or jump to NCERT Solutions for Class 12 Chemistry once you complete Class 11.

Benefits of Opting for Our NCERT Chemistry Class 11 Solutions

Chemistry is one of the fields of science. Whether you want to become an engineer or a doctor, chemistry will play an important role in it. To understand chemistry better, NCERT Class 11 Chemistry Solutions allows you to solve your doubts and thus helps you to perform great in your CBSE examinations and other examinations. 

Now the question comes: what is NCERT? Well, in simple terms, the short form of NCERT is the National Council of Educational Research and Training, which is a National board that publishes textbooks for students to understand the concepts in a very clear and easy way. NCERT not only provides textbooks for Chemistry but also provides many textbooks for different subjects as well. The books, which are published by NCERT, are well known for their well-researched, up-to-date, and understandable content. These books continue to be recommended by all schools that follow the CBSE curriculum. 

At eSaral, we aim to provide a simple way of teaching to students and help them to understand the basic concept of Chemistry NCERT class 11 Chemistry solutions PDF in a better way. We provide the solutions in PDF form so that you can access them in future without the internet. 

As we discussed earlier, when a student wishes to take up science during high school, chemistry is a mandatory subject. There are basically 2 combinations that you can take in the science stream. The first combination is Chemistry with Biology, and the second combination is Chemistry with Physics. No matter which combination you choose, chemistry is mandatory. 

Now coming to the basics of class 11 chemistry Units, chemistry is a subject which deals with chemical reactions, the matter of objects, elements, atoms, molecules, noble gases and much more. To get the basics right in chemistry, at eSaral, we strongly recommend that you seek help from our NCERT Chemistry Class 11 Solutions. If your basics are strong, then your dreams of studying either at IIT or AIIMS will come true. To crack the entrance exams, your basics should be strong. 

• Quality of Solutions

Our team has formulated the study material in such a simple way that helps you to understand how a problem should be approached and how to solve it. Even our team of experts, with the help of their expertise, trains the students to solve problems at ease. 

• Prepared by Expert Teachers

Our expert team is very experienced, and with their experience, they know how to simplify the toughest questions, which are very important for exams.  

• Helps in Scoring Good Marks

These NCERT Solutions for Class 11 Chemistry are designed for you in a very simple language. This simplicity is maintained so that you can understand the matter easily, and this will help you in preparing thoroughly before the exams. All the questions and solutions are designed keeping in mind the present exam syllabus and pattern. If you follow our NCERT Solution Class 11 Chemistry, then you can be sure that you will get good marks in your exams. 

• Ease of Understanding/ Studying/Memorising

Class 11 chemistry NCERT solutions formulated by us are designed in such an easy way that you can understand and memorise the content and principles without having any problems in understanding the topic. All the solutions with proper explanations are given so that the basics of chemistry are clear, and it will help you in building the foundation of chemistry. 

Advantages of Opting for the NCERT Solutions Class 11 Chemistry Units

• Your study sessions will become more organised and productive. You can download the solutions for the Units whenever you need and store them on your devices. And you can refer to them at your convenience and routine to find the right answers to the exercise questions.

• Using the NCERT textbook exercises as an evaluation tool will be more beneficial when you have the solutions in your hand. Complete preparing a Unit, and you can test your preparation level by solving the exercise questions given in the textbook. Calculate your performance by checking the answers given in the solutions. Through this, you can find out where you need to work harder and proceed’

• Resolve doubts in no time by referring to the CBSE class 11 chemistry NCERT solution and save your precious time for studying by resolving doubts faster and completing the syllabus faster.

For complete PCM coverage, explore NCERT Solutions for Class 11 Physics and NCERT Solutions for Class 11 Maths alongside your Chemistry preparation.

Ammonia turns up in at least two chapters on this list — the p-Block chapter and Chemical Bonding — and its formula is worth having in one place: chemical formula of ammonia.

If you want structured Unit-wise video lessons, doubt-solving support, and JEE/NEET-aligned practice alongside these NCERT solutions, eSaral's Class 11 Chemistry course — taught by IIT Bombay faculty — is built exactly for that. Bookmark this page and return whenever you start a new Unit.