NCERT Solutions for Class 11 Chemistry offer chapter-wise solutions for all textbook questions. The book is split into two parts, with Part 1 containing 6 chapters and Part 2 containing 3 chapters. Book 1 covers fundamental chemistry, classification of elements and thermodynamics, while Book 2 includes organic chemistry, redox reactions, and hydrocarbons. Shiksha Nation solutions follow a clear and structured format, explaining each topic with accuracy. With simple explanations and well-organised content, these NCERT solutions make revision easier and help students feel more confident in the exam.
NCERT Solutions for Class 11 Chemistry Latest Chapter wise 2026 27
NCERT Solutions for Class 11 Chemistry Part - 1
| S.No. | Chapter Name & Topic |
| 1 | Chapter 1 - Some Basic Concepts of Chemistry |
| 2 | Chapter 2 - Structure of Atom |
| 3 | Chapter 3 - Classification of Elements and Periodicity in Properties |
| 4 | Chapter 4 - Chemical Bonding And Molecular Structure |
| 5 | Chapter 5 - Thermodynamics |
| 6 | Chapter 6 - Equilibrium |
NCERT Solutions for Class 11 Chemistry Part - 2
| 1 | Chapter 7 - Redox Reactions |
| 2 | Chapter 8 - Organic Chemistry - Some Basic Principles and Techniques |
| 3 | Chapter 9 - Hydrocarbons |
Chapter-wise NCERT Solutions for Class 11 Chemistry Overview
Chapter 1 - Some Basic Concepts of Chemistry
The first chapter discusses the basic concepts that form the foundation of chemistry. Students learn about the nature of matter, physical and chemical properties, SI units, scientific notation, uncertainty in measurement and significant figures. The chapter explains the laws of chemical combinations, including the laws of conservation of mass, definite proportions, and multiple proportions, as well as Dalton’s atomic theory.
Students learn about atomic and molecular masses, the mole concept, molar mass, percentage composition, empirical and molecular formulas, and stoichiometry. The chapter also covers limiting reagents, concentration terms, and quantitative calculations involving chemical reactions.
Chapter 2 - Structure of Atom
Chapter 2 explains the internal structure of atoms and the scientific discoveries that led to modern atomic theory. Students learn about the discovery of electrons, protons, and neutrons, including Thomson’s, Rutherford’s, and Bohr’s atomic models and their limitations. The chapter also covers electromagnetic radiation, Planck’s quantum theory, atomic spectra, the photoelectric effect and the dual nature of matter and radiation.
Students also study de Broglie’s hypothesis, Heisenberg’s uncertainty principle, the quantum mechanical model of the atom, quantum numbers, atomic orbitals, and the electronic configuration of elements using the Aufbau principle, Pauli exclusion principle and Hund’s rule.
Chapter 3 - Classification of Elements and Periodicity in Properties
This chapter explains how the large number of known elements are systematically arranged based on similarities in their properties. Students learn about the historical development of element classification, including Dobereiner’s Triads, Newlands’ Law of Octaves, Mendeleev’s Periodic Table, and the Modern Periodic Law.
The chapter discusses the modern periodic table and explains how electronic configuration determines the position of elements. Students also study important periodic trends such as atomic and ionic radii, ionization enthalpy, electron gain enthalpy, electronegativity, valency, and metallic and non-metallic character.
Chapter 4 - Chemical Bonding and Molecular Structure
Chapter 4 explains how and why atoms combine to form molecules and compounds. Students learn about the octet rule, Lewis dot structures, ionic and covalent bonds, and the factors that influence bond formation. The chapter teaches important concepts such as lattice enthalpy, bond parameters, resonance, formal charge and hybridization.
Students study Valence Shell Electron Pair Repulsion theory, molecular orbital theory and the shapes of molecules based on electron pair arrangements. It also covers hydrogen bonding and van der Waals forces.
Chapter 5 - Thermodynamics
This chapter discusses the study of energy changes in physical and chemical processes. Students learn about thermodynamic terms such as system, surroundings, types of systems, state functions, internal energy, heat and work.
The chapter explains the First Law of Thermodynamics, enthalpy, calorimetry, and enthalpy changes associated with chemical reactions, including Hess’s Law of Constant Heat Summation. Students also study spontaneity of processes, entropy, the Second Law of Thermodynamics, Gibbs free energy, and the criteria for equilibrium.
Chapter 6 - Equilibrium
Equilibrium is the dynamic balance that exists in physical and chemical processes. Students learn about physical equilibrium involving changes of state and dissolution, as well as chemical equilibrium in reversible reactions.
The chapter explains the law of mass action, equilibrium constant (Kc and Kp), and the factors affecting equilibrium according to Le Chatelier’s principle. Students also study ionic equilibrium, acids and bases, pH, ionization of acids and bases, buffer solutions, hydrolysis of salts, solubility product and common ion effect.
Chapter 7 - Redox Reactions
Chapter 7 explains oxidation and reduction reactions. Students learn the meaning of oxidation, reduction, oxidising agents, reducing agents, and competitive electron transfer reactions. The chapter discusses oxidation numbers and the rules for assigning them.
It covers different types of redox reactions, including combination, decomposition, displacement, and disproportionation reactions, and teaches methods for balancing redox equations using oxidation number and ion-electron techniques. The chapter also includes the limitations of oxidation number concepts and the role of redox reactions in titrations, electrode processes and electrochemistry.
Chapter 8 - Organic Chemistry - Some Basic Principles and Techniques
This chapter covers the basics of organic chemistry and the study of carbon compounds. Students learn about the special properties of carbon, the classification of organic compounds, and the use of IUPAC nomenclature to name them systematically. The chapter explains functional groups, homologous series and different types of isomerism.
Students also learn about how organic reactions occur through concepts such as free radicals, carbocations, carbanions, electrophiles and nucleophiles. It also includes important electronic effects like the inductive effect and resonance. The chapter also discusses methods used to separate, purify and analyze organic compounds.
Chapter 9 - Hydrocarbons
The last chapter discusses hydrocarbons, organic compounds made only of carbon and hydrogen. Students learn about their classification into alkanes, alkenes, alkynes, and aromatic hydrocarbons based on the type of carbon–carbon bonds present.
The chapter covers IUPAC nomenclature, isomerism, methods of preparation, physical properties and important chemical reactions of these compounds, including substitution, addition, oxidation, polymerisation and combustion reactions. Students also study the structure and aromaticity of benzene, electrophilic substitution reactions of aromatic compounds and the environmental effects, toxicity, and carcinogenicity of certain hydrocarbons.
