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NCERT Chemistry Class 11: We have provided NCERT Solutions for Class 11 Chemistry on this page. These solutions have been prepared by experienced Chemistry teachers which will help in building the logical and analytical thinking approach among students to attain good grades. Answer of NCERT Chemistry Class 11 will help students prepare for the exams effectively. Students can also download the Chemistry class 11th NCERT Solutions pdf from the chapter wise pages.
NCERT Textbook of Chemistry class 11 has 9 chapters that contains various concepts which are crucial for the exam. It might be difficult for the students to remember all the chemical formulas and reactions during the final exam so regular practice is necessary. To understand the syllabus students can make use of the NCERT Solutions Chemistry Class 11th. Students preparing for entrance exams can refer NCERT Solutions Chemistry class 12.
What is Chemistry?
Chemistry is the branch of science that studies matter. A matter is anything and everything that you can see, feel, touch or experience for example a book, table, air, rock, tree etc. Chemistry studies the composition of these matters, what are they made up of, the change that happen when they are heated up or cooled.
Chemistry is subdivided into three main parts
- Physical Chemistry
- Inorganic Chemistry
- Organic Chemistry
Physical chemistry is the study of macroscopic properties, atomic properties, and phenomena in chemical systems. In physical chemistry, we study rates of chemical reactions, the energy transfers that occur in reactions, or the physical structure of materials at the molecular level.
Inorganic chemistry is the study of chemicals that do not, in general, contain carbon. Inorganic chemicals are commonly found in rocks and minerals. One current important area of inorganic chemistry deals with the design and properties of materials involved in energy and information technology.
Organic chemistry is the study of chemicals containing carbon with hydrogen. Carbon is one of the most abundant elements on Earth and is capable of forming a tremendously vast number of chemicals. Most of the chemicals found in all living organisms are based on carbon.
NCERT Chemistry Class 11 Chapters
The syllabus of Chemistry class 11 is divided into 9 chapters that are given below.
The following chapters have been removed from the NCERT Class 11 Chemistry textbook 2024-25.
NCERT Class XI Chemistry Chapters Overview
NCERT Chemistry Class 11 Chapter 1 Some Basic Concepts of Chemistry
This chapters deals with the basic entity of Chemistry, Matter. Candidates will understand types of matter, measurement and properties.
Chapter 1 Some Basic Concepts of Chemistry: Topics Covered
- General Introduction: Importance and scope of Chemistry
- Nature of matter, laws of chemical combination, Dalton's atomic theory: concept of elements, atoms and molecules
- Atomic and molecular masses, mole concept and molar mass, percentage composition, empirical and molecular formula, chemical reactions, stoichiometry and calculations based on stoichiometry
NCERT Chemistry Class 11 Chapter 2 Structure of Atom
The chapter structure of Atom deals with the building block of matter, atom. Atoms are the extremely small particles that are the basic building blocks of ordinary matter. Atoms join together to form molecules, which make up most objects. Different elements e.g. oxygen, carbon, uranium are made up of different types of atoms. An atom is the smallest unit of an element that will behave as that element.
Chapter 2 Structure of Atom: Topics Covered
- Discovery of Electron, Proton and Neutron, atomic number, isotopes and isobars.
- Thomson's model and its limitations. Rutherford's model and its limitations, Bohr's model and its limitations, concept of shells and subshells, dual nature of matter and light,
- de Broglie's relationship, Heisenberg uncertainty principle, concept of orbitals, quantum numbers,
- Shapes of s, p and d orbitals, rules for filling electrons in orbitals - Aufbau principle, Pauli's exclusion principle and Hund's rule,
- electronic configuration of atoms, stability of half-filled and completely filled orbitals.
Chemistry Class 11th NCERT Solutions Chapter 3 Classification of Elements and Periodicity in Properties
This chapter teaches about periodic table, various elements in different groups of the table, their properties, acidity and basicity.
Chapter 3 Classification of Elements and Periodicity in Properties: Topics Covered
- Significance of classification, brief history of the development of periodic table
- modern periodic law and the present form of periodic table
- periodic trends in properties of elements - atomic radii, ionic radii, inert gas radii
- Ionization enthalpy, electron gain enthalpy, electronegativity, valency.
- Nomenclature of elements with atomic number greater than 100.
Chemistry Class 11th NCERT Solutions Chapter 4 Chemical Bonding and Molecular Structure
This chapter comes with huge important in competitive exams as well as boards. Students will learn about various types of bonds, theories like VSEPR Theory and Valence Bond Theory are important topics in this chapter.
Chapter 4 Chemical Bonding and Molecular structure: Topics Covered
- Valence electrons, ionic bond, covalent bond, bond parameters
- Lewis structure, polar character of covalent bond, covalent character of ionic bond
- valence bond theory, resonance, geometry of covalent molecules
- 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.
NCERT Chemistry Class 11 Chapter 5 Chemical Thermodynamics
This is the chapter a student will see in every class in one form or the other beginning from class 11 to highest class of studies, PhD. Thermodynamics is the study of heat and its properties, the law governing its flow, changes into other forms and its classification. From exam point of view, this chapter is very important.
Chapter 5 Chemical Thermodynamics: Topics Covered
- Concepts of System and types of systems, surroundings, work, heat, energy, extensive and intensive properties, 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, ionization, solution and dilution.
- Second law of Thermodynamics (brief introduction)
- Introduction of entropy as a state function
- Gibb's energy change for spontaneous and nonspontaneous processes
- Criteria for equilibrium.
- Third law of thermodynamics (brief introduction).
NCERT Chemistry Class 11 Chapter 6 Equilibrium
In this chapter, students will learn about Equilibrium in physical and chemical processes, dynamic nature of equilibrium, law of mass action, equilibrium constant, factors affecting equilibrium - Le Chatelier's principle, etc.
Chapter 6 Equilibrium: Topics Covered
- 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- ionization of acids and bases, strong and weak electrolytes
- degree of ionization, ionization of poly basic acids, acid strength
- concept of pH, hydrolysis of salts (elementary idea)
- buffer solution, Henderson Equation, solubility product, common ion effect (with illustrative examples).
Class 11th NCERT Solutions Chemistry Chapter 7 Redox Reactions
Redox reactions are chemical reactions that include transfer of electrons between two reactants. In this chapter students will learn about types of redox reactions and decomposition reactions.
Chapter 7 Redox Reactions: Topics Covered
- Concept of oxidation and reduction
- redox reactions
- oxidation number
- balancing redox reactions in terms of loss and gain of electrons and change in oxidation number
- applications of redox reactions
NCERT Class XI Chemistry Chapter 8 Organic Chemistry- Some Basic Principles & Techniques
Organic Chemistry in class 11 is the beginning of wide world of Organic compounds. This chapter will introduce students to concepts about organic compounds, structural representation, classification, nomenclature, isomerism, purification of organic compounds and quantitative analysis. This chapter is important for entrance exams like JEE Mains as well as board exams.
Chapter 8 Organic Chemistry: Topics Covered
- General introduction, methods of purification
- Qualitative and quantitative analysis
- classification and IUPAC nomenclature of organic compounds
- Electronic displacements in a covalent bond:
- inductive effect, electromeric effect, resonance and hyper conjugation
- Homolytic and heterolytic fission of a covalent bond:
- free radicals, carbocations, carbanions, electrophiles and nucleophiles
- types of organic reactions.
Chemistry Class 11th NCERT Solutions Chapter 9 Hydrocarbons
This is a very important chapter from exam point of view. A lot of questions comes from this chapter in exam as well as in JEE Mains. A hydrocarbon is an organic compound consisting of hydrogen and carbon. Hydrocarbons are found in crude oil, natural gas, and coal among others. Students will learn about synthesis, preparation from alkyl halides, unsaturated hydrocarbons and carboxylic acids as well as its physical and chemical properties.
Chapter 9 Hydrocarbons: Topics Covered
- Classification of Hydrocarbons
- Aliphatic Hydrocarbons
- Alkanes - Nomenclature, isomerism, conformation (ethane only), physical properties, chemical reactions including free radical mechanism of halogenation, combustion and pyrolysis.
- Alkenes - Nomenclature, structure of double bond (ethene), geometrical isomerism, physical properties, methods of preparation, chemical reactions: addition of hydrogen, halogen, water, hydrogen halides (Markovnikov's addition and peroxide effect), ozonolysis, oxidation, mechanism of electrophilic addition.
- Alkynes - Nomenclature, structure of triple bond (ethyne), physical properties, methods of preparation, chemical reactions: acidic character of alkynes, addition reaction of - hydrogen, halogens, hydrogen halides and water.
- Aromatic Hydrocarbons: Introduction, IUPAC nomenclature, benzene: resonance, aromaticity, chemical properties: mechanism of electrophilic substitution. Nitration, sulphonation, halogenation, Friedel Craft's
alkylation and acylation, directive influence of functional group in monosubstituted benzene, Carcinogenicity and toxicity
NCERT Chemistry class 11: Unit wise weightage
| Unit No. | Unit Name | Marks |
| Unit I | Some Basic Concepts of Chemistry | 7 |
| Unit II | Structure of Atom | 9 |
| Unit III | Classification of Elements and Periodicity in Properties |
6 |
| Unit IV | Chemical Bonding and Molecular Structure | 7 |
| Unit V | Chemical Thermodynamics | 9 |
| Unit VI | Equilibrium | 7 |
| Unit VII | Redox Reactions | 4 |
| Unit VIII | Organic Chemistry: Some basic Principles and Techniques |
11 |
| Unit IX | Hydrocarbons | 10 |
| Total | 70 |
Practical Exam: Weightage
| Evaluation Scheme | Marks |
| Volumetric Analysis | 08 |
| Salt Analysis | 08 |
| Content Based Experiment | 06 |
| Project Work | 04 |
| Class record and viva | 04 |
| Total | 30 |
Chemistry Class 11th NCERT Solutions FAQs
Q. What are important chapters of Chemistry class 11?
Q. Is NCERT enough for scoring good marks in exam?
Q. Is Class 11 Chemistry hard?
Q. What are the chapters of chemistry in class 11?
• Some Basic Concepts of Chemistry
• Structure of Atom
• Classification of Elements and Periodicity in Properties
• Chemical Bonding and Molecular Structure
• States of Matter
• Thermodynamics
• Equilibrium
• Redox Reactions
• Hydrogen
• The s-Block Elements
• The p-Block Elements
• Organic Chemistry – Some Basic Principles & Techniques
• Hydrocarbons
• Environmental Chemistry
Q. Which is the most difficult chapter in Class 11 chemistry?
• Gaseous state
• Thermodynamics
• Ionic equilibrium
• Electrochemistry
These chapters contain mainly numerical questions that could be tricky and require logical understanding of formula applications to arrive at a solution.
Q. What topics from chapter Thermodynamics are most important for JEE?
Q. Which are important chapters from Chemistry class 11 for JEE Main exam?
• Stereochemistry
• Organic Compounds
• Quantum Numbers
• Atomic Mass of Elements
• Periodic Properties of Elements
• Elements and Their Symbols
• Balancing Chemical Equations
• Salt Analysis
Q. Is Organic Chemistry from class 11 hard?
Q. Which is tough- class 11 or 12 chemistry?
Q. Where can I download solutions of NCERT Chemistry class 11?
Q. How many parts of chemistry are there in 11?
Physical Chemistry: It is the study of macroscopic properties, atomic properties, and phenomena in chemical systems. It studies the rates of chemical reactions, the energy transfers that occur in reactions, or the physical structure of materials at the molecular level.
Inorganic Chemistry: Inorganic chemistry is the study of chemicals that do not, in general, contain carbon. Inorganic chemicals are commonly found in rocks and minerals. One current important area of inorganic chemistry deals with the design and properties of materials involved in energy and information technology.
Organic Chemistry: It is the study of chemicals containing carbon with hydrogen. Carbon is one of the most abundant elements on Earth and is capable of forming a tremendously vast number of chemicals (over twenty million so far.. Most of the chemicals found in all living organisms are based on carbon.
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