NCERT Solutions for Class 11 Chemistry Download Chapter-wise PDF for 2023-24

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NCERT Solutions for Class 11 Chemistry is a study material which is developed by the faculty at Enrootz Learning Academy by keeping in mind the grasping power of Class 11 students. NCERT Solutions for Class 11 are drafted in a simple and understandable manner to help students ace the exam without fear. Chemistry is a subject which contains a lot of chemical reactions and symbols. It might be difficult for the students to remember all these concepts effectively if not revised on a regular basis. So, making use of proper study material is very important.

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At Enrootz Learning Academy, students can access chapter-wise NCERT Solutions for Class 11 to get their doubts clarified instantly. The faculty has provided both online and offline modes of solutions which can be used free of cost. The chapter-wise links of NCERT Solutions for Class 11 Chemistry are as follows:

Chapter-Wise NCERT Solutions for Class 11 Chemistry

• • Chapter 1: Some Basic Concepts of Chemistry

  • Chapter 2: Structure of Atom

  • Chapter 3: Classification of Elements and Periodicity in Properties

  • Chapter 4: Chemical Bonding and Molecular Structure

  • Chapter 5: Thermodynamics

  • Chapter 6: Equilibrium

  • Chapter 7: Redox Reactions

  • Chapter 8: Organic Chemistry – Some Basic Principles & Techniques

  • Chapter 9: Hydrocarbons

The following chapters have been removed from the NCERT Class 11 Chemistry textbook 2023-24.

• States of Matter

• Hydrogen

• The s-Block Elements

• The p-Block Elements

• Environmental Chemistry

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NCERT Solutions Class 11 Chemistry

NCERT Solutions for Class 11 Chemistry at Enrootz Learning Academy is designed in such a way that students will be able to grasp all the concepts instantly. Each and every chemical reaction is explained with suitable examples and explanations in order to provide a quality learning experience for the students. For a student of Class 11, learning all the concepts from the NCERT Textbook would be a difficult task if they do not have a proper understanding of the concepts. The main objective of creating these solutions is to help students face the annual exam without fear. It not only enables logical and analytical thinking approach among students, but also helps them to attain good grades.

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NCERT Solutions Class 11 Chemistry Chapter Details and Exercises

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Chapter 1: Some Basic Concepts of Chemistry

This chapter explains the importance of chemistry, and concepts like molecular mass and atomic mass. A few basic theories and laws, like Avogadro’s law, Dalton’s atomic theory and the law of conservation of mass, are explained in brief in this chapter. You will also solve problems based on determining the molecular weight of compounds, mass percent and concentration. You will get a clear idea about the empirical and molecular formulae, molarity, molality and mole concept.

Topics Covered in Class 11 Chemistry Chapter 1 Some Basic Concepts of Chemistry :

General Introduction: Importance and scope of chemistry.
Historical approach to particulate nature of matter, laws of chemical combination, Dalton’s atomic theory: the concept of elements, atoms and molecules.
Atomic and molecular masses. Mole concept and molar mass; percentage composition and empirical and molecular formula; chemical reactions, stoichiometry and calculations based on stoichiometry.

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Chapter 2: Structure of Atom

Students will learn about Thomson’s atomic model, subatomic particles, Bohr’s model, Rutherford’s atomic model and quantum mechanical model of atom. Problems on relationship between frequency and wavelength, energy associated with electromagnetic radiation and subatomic particles are present in this chapter. You will get to know how to write the electron configurations and the electron transition in different shells which is important for the exam.

Topics Covered in Class 11 Chemistry Chapter 2 Structure of Atom :

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 exclusion principle and Hund’s rule, electronic configuration of atoms, stability of half filled and completely filled orbitals.

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Chapter 3: Classification of Elements and Periodicity in Properties

From the exam point of view, classification of elements is very important. Most of the questions in the final exam and various competitive exams appear from this chapter. So learning all the concepts from this chapter is important. From this chapter, students will also learn about the s-block, p-block, d-block and f-block elements from the periodic table, trends in physical and chemical properties and chemical reactivity. By learning this chapter thoroughly, students will obtain good score in the exam.

Topics Covered in Class 11 Chemistry Chapter 3 Classification of Elements and Periodicity in Properties :

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, valence.

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Chapter 4: Chemical Bonding and Molecular Structure

Chemistry is based on the things which we observe in our surroundings and is called the central science. The topics discussed in this chapter are – VSEPR Theory, Lewis structures, Valence Bond Theory, polar character of covalent bonds and hydrogen bonding. Students will learn how to draw Lewis dot symbols for molecules, atoms and polyatomic ions. The solutions at Enrootz Learning Academy contain diagrams for each concept to provide visual learning experience for the students.

Topics Covered in Class 11 Chemistry Chapter 4 Chemical Bonding and Molecular Structure :

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.

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Chapter 5: States of Matter

This chapter explains the intermolecular forces and how they affect the physical state of a substance. It deals with other concepts associated with gaseous and liquid states of matter. This is the main reason why this chapter is important for the exam. Students will be able to understand the Boyle’s Law, Charle’s Law, Gay Lussac’s Law and Avogadro Law which carry more marks as per the exam pattern. Problems on finding partial pressure, critical temperature and pressure, Van der Waals force and other intermolecular forces are present in this chapter.

Topics Covered in Class 11 Chemistry Chapter 5 States of Matter :

Three states of matter, intermolecular interactions, type of bonding, melting and boiling points, role of gas laws in elucidating the concept of the molecule, Boyle’s law, Charles’ law, Gay Lussac’s law, Avogadro’s law, ideal behaviour, empirical derivation of gas equation, Avogadro’s number, ideal gas equation, deviation from ideal behaviour, liquefaction of gases, critical temperature.
Liquid State – Vapour pressure, viscosity and surface tension (qualitative idea only, no mathematical derivations).

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Chapter 6: Thermodynamics

It is a branch of science which explains the relationship between heat and the other energy forms. On the basis of exchange of matter and energy, thermodynamic systems are divided into three types – open, closed and isolated systems. Students will learn more about the concepts like terms in thermodynamics, applications, calorimetry, enthalpies, spontaneity and Gibbs energy change and equilibrium. The problems in the NCERT Solutions are answered in a systematic manner completely based on the latest syllabus of the CBSE board.

Topics Covered in Class 11 Chemistry Chapter 6 Thermodynamics :

Concepts of system, 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, and dilution.
Introduction of entropy as a state function, free energy change for spontaneous and nonspontaneous process, equilibrium.

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Chapter 7: Equilibrium

From this chapter, students will learn buffer solutions, equilibrium constant and the common ion effect. As this chapter contains a lot of concepts, a thorough understanding of each of them is important to perform well in the annual exam. The solutions contain clear cut explanations for each and every concept so that all the queries of the students are clarified. The concepts discussed in this chapter are – solid liquid equilibrium, applications of equilibrium constant, factors affecting equilibria, acids, bases and salts, buffer solutions etc.

Topics Covered in Class 11 Chemistry Chapter 7 Equilibrium:

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, concept of pH. Hydrolysis of salts (elementary idea), buffer solutions, solubility product, common ion effect (with illustrative examples).

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Chapter 8: Redox Reactions

The fact here is that the field of electrochemistry deals with the redox reactions. It is important for the students to learn this chapter in order to score good marks in the final exam. Students will get questions based on the classical idea of redox reaction, redox reactions in terms of electron transfer reactions, oxidation number and electrode processes. Students are recommended to first complete the entire chapter using the NCERT textbook prescribed by the CBSE board.

Topics Covered in Class 11 Chemistry Chapter 8 Redox Reaction :

Concept of oxidation and reduction, redox reactions, oxidation number, balancing redox reactions, applications of redox reactions.

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Chapter 9: Hydrogen

Hydrogen is the lightest element with one electron and proton. The most abundant element in the entire universe is dihydrogen. Hydrogen is an important element which makes up 80% of the entire mass of the universe. It is very important for the students to know about this element in order to secure good marks in the final exam. Students will also learn about the preparation and properties of dihydrogen and its applications in our daily life. It might be difficult for the students to grasp all these concepts at a stretch, so making use of a perfect study material will help you through it.

Topics Covered in Class 11 Chemistry Chapter 9 Hydrogen :

Position of hydrogen in periodic table, occurrence, isotopes, preparation, properties and uses of hydrogen; hydrides – ionic, covalent and interstitial; physical and chemical properties of water, heavy water; hydrogen peroxide – preparation, reactions and structure; hydrogen as a fuel.

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Chapter 10: The s-Block Elements

Students will learn about the Alkali metals and Alkaline earth metals which are the group 1 and group 2 in the periodic table. Some of the concepts like physical and chemical properties of s-block elements, general characteristics of compounds and about important compounds like calcium. The biological importance of calcium and magnesium is also explained clearly in this chapter. Periodic table and the elements present in them is a hot topic in the exam perspective. For this reason, students are highly recommended to learn all these concepts thoroughly to score well.

Topics Covered in Class 11 Chemistry Chapter 10 The s-Block Elements :

Group 1 and Group 2 elements:
General introduction, electronic configuration, occurrence, anomalous properties of the first element of each group, diagonal relationship, trends in the variation of properties (such as ionization enthalpy, atomic and ionic radii), trends in chemical reactivity with oxygen, water, hydrogen and halogens; uses.

Preparation and properties of some important compounds:
Sodium carbonate, sodium chloride, sodium hydroxide and sodium hydrogen carbonate, biological importance of sodium and potassium. CaO, CaCO3, and industrial use of lime and limestone, biological importance of Mg and Ca.

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Chapter 11: The p-Block Elements

The elements present between the 13th and 18th group are called the p-block elements. As this chapter has a lots of concepts, it is very important for the students to revise it regularly. Students will get a gist of the p-block elements, where the last electron enters or is found on the p-subshell. Some of the concepts which you will learn in this chapter are – boron family, important compounds of boron, uses of aluminium and boron, carbon family, allotropes of carbon and important compounds of silicon and carbon.

Topics Covered in Class 11 Chemistry Chapter 11 The p-Block Elements :

General Introduction to p-Block Elements
Group 13 elements: General introduction, electronic configuration, occurrence, variation of properties, oxidation states, trends in chemical reactivity, anomalous properties of first element of the group; Boron – physical and chemical properties, some important compounds: borax, boric acids, boron hydrides. Aluminium: uses, reactions with acids and alkalies.
Group 14 elements: General introduction, electronic configuration, occurrence, variation of properties, oxidation states, trends in chemical reactivity, anomalous behaviour of first element. Carbon – catenation, allotropic forms, physical and chemical properties; uses of some important compounds: oxides.
Important compounds of silicon and a few uses: silicon tetrachloride , silicones, silicates and zeolites.

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Chapter 12: Organic Chemistry – Some Basic Principles and Techniques

When it comes to exam preparation, both organic and inorganic chemistry plays an important role in attaining good marks. This chapter will introduce you to concepts such as organic compounds, structural representation, classification, nomenclature, isomerism, purification of organic compounds and quantitative analysis. If students are not able to learn these concepts using the NCERT textbook they can download the PDF of solutions which are available online for absolutely free of cost.

Topics Covered in Class 11 Chemistry Chapter 12 Organic Chemistry – Some Basic Principles :

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

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Chapter 13: Hydrocarbons

The scientific study of properties, structure, reactions, composition and synthesis of organic compounds is called organic chemistry. It teaches the students about concepts like alkanes and its preparation from alkyl halides, unsaturated hydrocarbons and carboxylic acids. Students will also learn about the physical and chemical properties of alkanes as per the prescribed CBSE syllabus. As this chapter is important from the exam point of view, students must highly concentrate on all the concepts and memorise it thoroughly to perform well in the exam.

Topics Covered in Class 11 Chemistry Chapter 13 Hydrocarbons :

Classification of hydrocarbons
Alkanes: Nomenclature, isomerism, conformations (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 mono-substituted benzene; carcinogenicity and toxicity

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Chapter 14: Environmental Chemistry

Various concepts which are related to environment like water pollution, atmospheric pollution, soil pollution and its reasons are explained briefly in this chapter. Along with this students will also learn about the use of pesticides to reduce soil pollution and strategies to control pollution like waste disposal. By learning this chapter thoroughly, students will get to know about the pollution occurring in nature by our activities.

Topics Covered in Class 11 Chemistry Chapter 14 Environmental Chemistry :

Environmental pollution : Air, water and soil pollution, chemical reactions in atmosphere, smogs, major atmospheric pollutants; acid rain, ozone and its reactions, effects of depletion of ozone layer, greenhouse effect and global warming – pollution due to industrial wastes; green chemistry as an alternative tool for reducing pollution, strategy for control of environmental pollution.

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CBSE Marking Scheme 2023-24

The entire syllabus as per CBSE board is divided portions containing all the concepts divided equally. By doing this, the faculty explain the relationship between the various topics which are of higher importance. At the end of each academic year, the CBSE conducts exams in accordance to the syllabus allotted for each year. This mainly aims to provide students the ability to learn the various concepts that are crucial from the exam perspective.

Sl. No.UnitMarks

1Some Basic Concepts of Chemistry7

2Structure of Atom9

3Classification of Elements and Periodicity in Properties6

4Chemical Bonding and Molecular Structure7

5Chemical Thermodynamics9

6Equilibrium7

7Redox Reactions4

8Organic Chemistry: Some basic Principles and Techniques11

9Hydrocarbons10

Total70

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Frequently Asked Questions on NCERT Solutions for Class 11 Chemistry

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Is the NCERT Solutions for Class 11 Chemistry free of cost?

Yes, the students can access the NCERT Solutions for Class 11 Chemistry for free from Enrootz Learning Academy. Both online and offline study materials are available with a free download option, which can be used by the students based on their needs. The PDFs contain detailed and accurate solutions for all the questions present in the NCERT textbook. These solutions also improve confidence among students and help them to face the exam without fear.

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How many chapters are present in the NCERT Solutions for Class 11 Chemistry?

There are about 14 chapters in the NCERT Solutions for Class 11 Chemistry. The solutions at Enrootz Learning Academy provide in-depth knowledge among students in answering logical reasoning questions. Theoretical questions contain accurate and to-the-point solutions to help students grasp the concepts easily. Top-notch subject experts create these solutions to help students improve their academic performance. The PDF format of solutions contains a free download option, which enables students to learn new concepts without any time limits.

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