Course Content
CHAPTER 1: SOME BASIC CONCEPTS OF CHEMISTRY
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Introduction of Chemistry
14:32
Matter || Pure Substance || Properties of Matter
Quantitative property || The International System of Units (SI) || Prefixes used in SI System || Scientific Notation
Precision & Accuracy || Significant figures || Dimensional Analysis
Law of Chemical Combination
Dalton’s Atomic Theory || Atomic Mass || Average Atomic Mass || Molecular Mass
Mole Concept and Molar Masses || Percentage Composition || Empirical Formula for Molecular formula
Stoichiometry || Limiting Reagent
Reactions in Solution – Mass per cent or weight percent || Mole fraction || Molarity || Molality
NCERT Solutions for Class 11 Chemistry Chapter 1 Some basic Concepts of Chemistry
CBSE Class 11 Chemistry Chapter-1 Important Questions
Chemistry Question Bank || NEET || JEE || AIIMS
Class 11th Chemistry Chapter 1 Quiz Test For Students
01:30:00
CHAPTER 2: STRUCTURE OF ATOM
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INTRODUCTION || DISCOVERY OF ELECTRON
30:35
DISCOVERY OF PROTON || DISCOVERY OF NEUTRON || ATOMIC MODELS OF ATOM
ISOTOPES || ISOBARS || ISOTONES || ISOELECTRONIC
DUAL NATURE OF LIGHT: DEVELOPMENT LEADING TO BOHR’S MODEL || Black body radiation and Photoelectric effect
Planck’s quantum theory || BOHR’S THEORY
EXPLANATION OF HYDROGEN SPECTRA || LIMITATIONS OF BOHR MODEL OF AN ATOM || DUAL NATURE OF PARTICLE || QUANTUM MECHANICS || Pauli’s exclusion Principle
NCERT Solutions for Class 11 Chemistry Chapter 2 Structure of Atom
CHAPTER 3: CLASSIFICATION OF ELEMENTS
Section Name Topic Name 3 Classification of Elements and Periodicity in Properties 3.1 Why do we Need to Classify Elements ? 3.2 Genesis of Periodic Classification 3.3 Modern Periodic Law and the present form of the Periodic Table 3.4 Nomenclature of Elements with Atomic Numbers > 100 3.5 Electronic Configurations of Elements and the Periodic Table 3.6 Electronic Configurations and Types of Elements: s-, p-, d-, f – Blocks 3.7 Periodic Trends in Properties of Elements
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Introduction || Doberneiner’s Triads
26:18
Newland’s Law of Octave || Limitations of Newlands’ law of octaves
Mendeléev’s periodic table || Achievements of Mendeléev’s periodic table || Limitation of Mendeleev’s classification
The Modern Periodic Table || Position of Element in Modern Periodic Table || Trends in the modern periodic table
NCERT Solutions for Class 11 Chemistry Chapter 3 Classification of Elements and Periodicity in Properties
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CHAPTER 4: CHEMICAL BONDING AND MOLECULAR STRUCTURE
4 Chemical Bonding and Molecular Structure 4.1 Kössel-Lewis Approach to Chemical Bonding 4.2 Ionic or Electrovalent Bond 4.3 Bond Parameters 4.4 The Valence Shell Election Pair Repulsion (VSEPR) Theory 4.5 Valence Bond Theory 4.6 Hybridisation 4.7 Molecular Orbital Theory 4.8 Bonding in Some Homonuclear Diatomic Molecules 4.9 Hydrogen Bonding
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Introduction || Kossel and Lewis Approach
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Types of chemical bond || Factors affecting the formation of ionic bond || General properties of ionic compounds
COVALENT BOND || COORDINATE BOND
Bond parameters : Bond Length , Bond Angle, Bond Enthalpy, Bond Order || Resonance
Polarity & Dipole moment || Ionic Percentage || Polarization
VSEPR THEORY || Hybridization || Valence bond theory || Overlapping: sigma and pi bond || Molecular orbital theory
Hydrogen bonding || Hydrogen bonding in ice and water
NCERT Solutions for Class 11 Chemistry Chapter 4 Chemical Bonding and Molecular Structure
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Chemical Bonding & Molecular Structure Question For NEET || JEE || AIIMS
CHAPTER 5: STATE OF MATTER
Section Name Topic Name 5 States of Matter 5.1 Intermolecular Forces 5.2 Thermal Energy 5.3 Intermolecular Forces vs Thermal Interactions 5.4 The Gaseous State 5.5 The Gas Laws 5.6 Ideal Gas Equation 5.7 Kinetic Energy and Molecular Speeds 5.8 Kinetic Molecular Theory of Gases 5.9 Behaviour of Real Gases: Deviation from Ideal Gas Behaviour 5.10 Liquefaction of Gases 5.11 Liquid State
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Introduction || State of Matter
27:52
Intermolecular Forces || Dispersion Forces or London Forces
Dipole – Dipole Forces || Dipole – Induced Dipole Force || Hydrogen Bond || Thermal Energy
Intermolecular Forces Vs Thermal Interations || Boyle’s Law || Charles’ Law || Gay Lussac’s Law
Avogadro Law || Ideal Gas Equation || Density and Molar Mass of a Gaseous Substance
Dalton’s Law of Partial Pressure || Partial pressure in terms of mole fraction || Kinetic molecular theory of gases || Behaviour of real gases: deviation from ideal gas behaviour || Surface Tension
Viscosity
NCERT Solutions for Class 11 Chemistry Chapter 5 States of Matter
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State of Matter Question For NEET || JEE || AIIMS
CHAPTER 6: THERMODYNAMICS
Section Name Topic Name 6 Thermodynamics 6.1 Thermodynamic Terms 6.2 Applications 6.3 Measurement of ∆U and ∆H: Calorimetry 6.4 Enthalpy Change, ∆rH of a Reaction – Reaction Enthalpy 6.5 Enthalpies for Different Types of Reactions 6.6 Spontaneity 6.7 Gibbs Energy Change and Equilibrium
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Thermodynamics of Thermodynamics || Universe || System || Surrounding || types of systems || Internal Energy
24:40
1st Law of Thermodynamics || Enthalpy || Heat capacity || Types of molar heat capacities || Relation between Cp &Cv || Calorimeter
Enthalpies of Reaction || Enthalpy of Combustion || Calorific value || Hess’s law of heat summation || Other type of enthalpies || Born- Haber cycle || Enthalpies of phase transition || Bond enthalpy || Limitation of 1st law of thermodynamics
Entropy || How s & q related? || How S&T related? || Second law of thermodynamics || Standard molar entropy || Gibbs free energy || Third law of thermodynamics
NCERT Solutions for Class 11 Chemistry Chapter 6 Thermodynamics
NCERT Solutions for Class 11 Chemistry Chapter 6 Very Short Answer Type Questions
NCERT Solutions for Class 11 Chemistry Chapter 6 Short Answer Type Questions
NCERT Solutions for Class 11 Chemistry Chapter 6 Long Answer Type Questions
CHAPTER 7: EQUILIBRIUM
Section Name Topic Name 7 Equilibrium 7.1 Equilibrium in Physical Processes 7.2 Equilibrium in Chemical Processes – Dynamic Equilibrium 7.3 Law of Chemical Equilibrium and Equilibrium Constant 7.4 Homogeneous Equilibria 7.5 Heterogeneous Equilibria 7.6 Applications of Equilibrium Constants 7.7 Relationship between Equilibrium Constant K, Reaction Quotient Q and Gibbs Energy G 7.8 Factors Affecting Equilibria 7.9 Ionic Equilibrium in Solution 7.10 Acids, Bases and Salts 7.11 Ionization of Acids and Bases 7.12 Buffer Solutions 7.13 Solubility Equilibria of Sparingly Soluble Salts
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Introduction || Types of equilibrium || Boiling point || Equilibrium involving dissolution of solids || General characteristics of physical equilibrium || Equilibrium Involving in Chemical Process
22:43
Law of mass action || Characteristics of Equilibrium constant (k) || Characteristics of chemical equilibrium || Effect of temperature on K
Chemical equilibrium || Characteristics of K || Application of Equilibrium constant || Factors affecting state of equilibrium “Le Chartlier’s principle || Substances: electrolytes and non electrolytes
Acids, bases and salts || 2nd Concept: Bronsted Lowry concept || Conjugate acid –base concept || 3rd concept: Lewis concept || Expressing Hydrogen ion concentration: pH scale || Calculation of PH Value
Protic and non- Protic acids || Hydrolysis of salt || Different kind of salts || Buffer solution || Solubility product ||
NCERT Solutions for Class 11 Chemistry Chapter 7 Equilibrium
NCERT Solutions for Class 11 Chemistry Chapter 7 Very Short Answer Type Questions
CHAPTER 8: REDOX REACTIONS
Section Name Topic Name 8 Redox Reactions 8.1 Classical Idea of Redox Reactions-Oxidation and Reduction Reactions 8.2 Redox Reactions in Terms of Electron Transfer Reactions 8.3 Oxidation Number 8.4 Redox Reactions and Electrode Processes
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Introduction || Oxidation and Reduction || oxidation number || Redox reaction in terms of oxidation number
Balancing of Redox reactions || Types of Redox reactions
Redox couple || Electrochemical cell || Functions of salt bridge || Representation of the cell || Electrode potential || Electromotive force || Electromotive force || Electrochemical series || Redox reaction as the basis for Titrations
NCERT Solutions for Class 11 Chemistry Chapter 8 Redox Reactions
NCERT Solutions for Class 11 Chemistry Chapter 8 Very Short Answer Type Questions
NCERT Solutions for Class 11 Chemistry Chapter 8 Short Answer Type Questions
CHAPTER 9: HYDROGEN
Section Name Topic Name 9 Hydrogen 9.1 Position of Hydrogen in the Periodic Table 9.2 Dihydrogen, H2 9.3 Preparation of Dihydrogen, H2 9.4 Properties of Dihydrogen 9.5 Hydrides 9.6 Water 9.7 Hydrogen Peroxide (H2 O2) 9.8 Heavy Water,D2O 9.9 Dihydrogen as a Fuel
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Introduction || Characteristics of Hydrogen || Difference with alkali metals || Similarities with Halogens || Differences with Halogen || Dihydrogen
15:47
Physical properties of H2 || Chemical Properties || Uses of H2
Hydrides || Covalent or molecular hydrides || Metallic  hydrides
Water || Physical properties || Chemical properties || Hardness of water  || Methods to remove hardness
Hydrogen peroxide || Physical Properties || Chemical Properties || Uses of Hydrogen peroxide
Heavy water || Physical properties || Chemical Properties
NCERT Solutions for Class 11 Chemistry Chapter 9 Hydrogen
NCERT Solutions for Class 11 Chemistry Chapter 9 Very Short , Short and Long Answer Type Questions
CHAPTER 10: S-BLOCK ELEMENTS
Section Name Topic Name 10 The s-Block Elements 10.1 Group 1 Elements: Alkali Metals 10.2 General Characteristics of the Compounds of the Alkali Metals 10.3 Anomalous Properties of Lithium 10.4 Some Important Compounds of Sodium 10.5 Biological Importance of Sodium and Potassium 10.6 Group 2 Elements : Alkaline Earth Metals 10.7 General Characteristics of Compounds of the Alkaline Earth Metals 10.8 Anomalous Behaviour of Beryllium 10.9 Some Important Compounds of Calcium 10.10 Biological Importance of Magnesium and Calcium
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Introduction || Diagonal Relationship || Atomic and Ionic Radii of alkali metals
25:32
Ionization Enthalpy and Hydration Enthalpy of alkali metals || Physical properties of alkali metals || Chemical Properties of alkali metals || Anomalous properties of lithium || Washing Soda
Preparation of washing soda by solvay’s process || Sodium Chloride || Caustic Soda || Baking Soda || Electronic Configuration of alkaline earth metal || Atomic and Ionic Radii of alkaline earth metal
Ionization Enthalpy of alkaline earth metal || Hydration Enthalpy of alkaline earth metal || Physical Properties of alkaline earth metal || Chemical Properties of alkaline earth metal
Quick Lime || Slaked Lime || Calcium Carbonate (CaCO3) || Plaster of Paris || Cement || Uses of s-block elements
NCERT Solutions for Class 11 Chemistry Chapter 10 The s-Block Elements
NCERT Solutions for Class 11 Chemistry Chapter 10 Very Short, Short & Long Answer Type Questions
CHAPTER 11: P-BLOCK ELEMENTS
Section Name Topic Name 11 The p-Block Elements 11.1 Group 13 Elements: The Boron Family 11.2 Important Trends and Anomalous Properties of Boron 11.3 Some Important Compounds of Boron 11.4 Uses of Boron and Aluminium and their Compounds 11.5 Group 14 Elements: The Carbon Family 11.6 Important Trends and Anomalous Behaviour of Carbon 11.7 Allotropes of Carbon 11.8 Some Important Compounds of Carbon and Silicon
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Introduction of p- block || Inert pair effect || Group 13 Elements
Chemical properties of group 13 || Important trends || Uses of Boron || Uses of Aluminum || Borax || PROPERTIES OF BORAX || Uses of Borax
Introduction of Group – 14 || Physical Properties of group 14 || Chemical properties of group 14 || Structure of CCl4 || Allotropes of carbon || Properties and Uses of diamond and graphite || Types of Charcoal || Uses of Carbon, Germanium, Lead, & Tin.
Carbon monoxide (CO) || Carbon dioxide (CO2) || Silicon dioxide (SiO2) || Crystalline form of silica || Structure of Silicon dioxide || Silicones || Silicates || Zeolites
NCERT Solutions for Class 11 Chemistry Chapter 11 The p-Block Elements
NCERT Solutions for Class 11 Chemistry Chapter 11 Very Short, Short & Long Answer Type Questions
CHAPTER 12: CHARACTERIZATION OF ORGANIC COMPOUND
Section Name Topic Name 12 Organic Chemistry – Some Basic Principles and Techniques 12.1 General Introduction 12.2 Tetravalence of Carbon: Shapes of Organic Compounds 12.3 Structural Representations of Organic Compounds 12.4 Classification of Organic Compounds 12.5 Nomenclature of Organic Compounds 12.6 Isomerism 12.7 Fundamental Concepts in Organic Reaction Mechanism 12.8 Methods of Purification of Organic Compounds 12.9 Qualitative Analysis of Organic Compounds 12.10 Quantitative Analysis
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Introduction || COMPOUNDS || Friedrich Wohler || IMPORTANT FEATURE OF π BONDS  || Branches of Organic Compounds || Functional Group
19:51
Homologous series || IUPAC system || Different Type of Organic Compounds ||  Alkyl halides
IUPAC and Common names of compounds || RULES FOR IUPAC || In case of double & triple bond
RULES FOR NAMING ORGANIC COMPOUND WITH FUNCTIONAL GROUP || PREFIX USED FOR SECONDARY FUNCTIONAL GROUP || NOMANCLATURE OF AROMATIC COMPOUNDS
ISOMERISM || The structural isomerism type || The different types of stereoisomerism || CONFORMATIONAL ISOMERISM
ELECTRON DISPLACEMENT IN COVALENT BONDS || HYPER CONJUGATION || Fundamental concepts of organic reactions || REACTION INTERMEDIATES
Types of Carbocations || Carboanion || Types of Carboanions ||  Attacking agents
Types of organic reactions || Addition Reaction || Elimination reaction
Methods of purification of organic compounds || Crystallisation || Distillation || Fractional distillation || Distillation under reduced pressure || Steam distillation
Differential extraction || Chromatography || Adsorption chromatography || Column chromatography || Thin layer chromatography || Position chromatography
Detection of carbon and hydrogen || Detection of other elements || Test for Nitrogen || Test for Sulphur || Test for halogens ||  Test for phosphorous || Quantitative analysis || Dumas method || Kjeldahl’s method
NCERT Solutions for Class 11th Chemistry Chapter 12 Organic Chemistry Some Basic Principles and Techniques
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CHAPTER 13: HYDROCARBON
Section Name Topic Name 13 Hydrocarbons 13.1 Classification 13.2 Alkanes 13.3 Alkenes 13.4 Alkynes 13.5 Aromatic Hydrocarbon 13.6 Carcinogenicity and Toxicity
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Introduction || Classification of hydrocarbons || Aromatic || Alkanes || Introduction of alkanes || Isomerism is alkanes
20:34
Classification of Alkanes || Preparation of alkanes
Physical Properties of alkanes || Chemical properties of alkanes
Conformational Isomerism || Torsional strain
Alkenes || ISOMERISM || Stereoisomerism || Stability of Alkenes || Preparation  of Alkenes ||  Physical Properties Of alkenes
Chemical properties of alkenes
Alkynes ||  Structure of ethyne || Isomerism || Preparation of Alkynes || Physical properties of alkynes || Chemical properties of alkynes
Aromatic Compounds || Nomenclature || Isomerism || Stability and structure of benzene || Huckle rule of Aromatic compounds || Preparation of Benzene || Physical properties of benzene || Chemical properties of benzene
NCERT Solutions for Class 11 Chemistry Chapter 13 Hydrocarbons
NCERT Solutions for Class 11 Chemistry Chapter 13 Very Short , Short and Long Answer Type Questions
CHAPTER 14: ENVIRONMENTAL CHEMISTRY
Section Name Topic Name 14 Environmental Chemistry 14.1 Environmental Pollution 14.2 Atmospheric Pollution 14.3 Water Pollution 14.4 Soil Pollution 14.5 Industrial Waste 14.6 Strategies to control Environmental Pollution 14.7 Green Chemistry
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Introduction || Atmosphere || Environmental chemistry || Environmental pollution || Atmospheric pollution || causes of pollution
Types of pollutants || Primary pollutant || Secondary pollutant || Biodegradable || Non-biodegradable
Types of pollution || Air pollution || Water pollution || Soil pollution
Green House Effect || Global warming || Acid rain || Hydrocarbons || Chlorofluorocarbons
Ozone || Ozone hole || Montreal protocol || Particulate pollutants
Smog and Photochemical smog
Water pollution
Soil pollution || Management of industrial waste
Green chemistry
NCERT Solutions for Class 11 Chemistry Chapter 14 Environmental Chemistry
NCERT Solutions for Class 11 Chemistry Chapter 14 Very Short, Short & Long Answer Type Questions
Class 11th Chemistry Online Class: Elevate Your CBSE Board Success
About Lesson

NCERT Solutions for Class 11 Chemistry Chapter 9 Very Short Answer Type Questions

Question 1. Which isotope of hydrogen is radioactive?
Answer: Tritium.

 

Question 2. What is the importance of heavy water with regard to nuclear power generation ?
Answer: It is used as a moderator and helps to control the nuclear reaction.

Question 3. What is zeolite?
Answer: It is hydrated sodium aluminium silicate, Na2Al2Si2O8.xH2O.

Class 11th Chemistry Hydrogen Notes and NCERT Solution

Question 7. Give two advantages of using hydrogen over gasoline as a fuel.
Answer: 

  • High heat of combustion
  •  It is pollution free.

Question 8. What type of elements form interstitial hydrides?
Answer: d-block and f-block elements.

Question 9. What is perhydrol?
Answer:  Perhydrol is the trade name of H2O2. It is used as an antiseptic.

Question 10. What is meant by hard water?
Answer: Water which does not produce lathers with soap is known as hard water. Hardness is due to the presence of bicarbonates, sulphates and chlorides of Ca2+ and Mg2+ .

Question 11. Which gas is evolved when Mg3N2 (Magnesium nitride) is treated with H2O? Give chemical reaction.
Answer:  NH3 gas is evolved.
Mg3N2 + 6H2O ———–> 3Mg(OH)2 + 2NH3

Question 12. Which compounds cause temporary hardness of water?
Answer: Ca(HCO3)2 and Mg (HCO3)2

Question 13. Which isotope of hydrogen does not have neutron ?
Answer: 11H does not have neutron. It is called protium.

Question 14. Name a substance which can oxidise H2O2
Answer: Acidified KMnO4.

Question 15. Which type of hydrides are generally non-stoichiometric in nature?
Answer: Interstitial hydrides are non-stoichiometric in nature.

Question 16. What is the cause of bleaching action of H2O2?
Answer: H2O2(l) ———-> H2O(l) + O(g)
Nascent oxygen produced is responsible for bleaching action.

Question 17. What is the use of hydrogen in the manufacture of Vanaspati Ghee?
Answer: H2 is used as reducing agent to convert vegetable oil into vegetable ghee.

Question 18. Name the phenomenon of adsorption of hydrogen on metal surface.
Answer: Occlusion.

NCERT Solutions for Class 11 Chemistry Chapter 9 Short Answer Type Questions

Question 1. Show how H2O2 junctions both as a reducing and as an oxidising agent.
Answer: As oxidising agent.
2I– + H2O2 + 2H+ ———> I2 + 2H2O
As reducing agent.
H2O2 + Ag2O ———-> 2Ag + H2O+ O2

Question 2. What are interstitial hydrides? Give two examples.
Answer: Many transition and inner-transition metals absorb hydrogen into the interstices of their lattices to yield metal like hydrides also called the interstitial hydrides. These hydrides are generally non stoichiometric and their composition vary with temperature and pressure.
For example,TiH1.73, CeH2.7

Class 11th Chemistry Hydrogen Notes and NCERT Solution
Class 11th Chemistry Hydrogen Notes and NCERT Solution

Question 6.(a) How is dihydrogen prepared from water by using a reducing agent?
(b) Give the industrial use of dihydrogen which depends upon heat liberated when it bums.
Answer: (a) Dihydrogen is prepared from water by the action of alkali metals like Na and K which is a strong reducing agent.
2Na + 2H2O ———-> 2NaOH + H2
2K + 2H2O ———> 2KOH + H2
(b)For welding purposes.
H2(g) + 1\2 O2(E) ————> H2O (g) + heat

Question 7. Water molecule is bent, not linear. Explain?
Answer:  In water molecule, O is SP3 hybridized. Due to stronger lone pair-lone pair repulsion than bond pair-bond pair repulsions, the HOH bond angle decreases from 109.5° to 104.5°. Thus water is bent molecule.

Question 8. Account for the following:
(i) dihydrogen gas is not preferred in balloons.
(ii) Cone. H2S04 cannot be used for drying H2.
Answer: (i) Dihydrogen is the lighest gas but due to its highly combustible nature it is not preferred in balloons.
(ii) Cone. H2S04 on absorbing H2O forms moist H2 produces so much heat that hydrogen catches fires.

Question 9. Calculate the volume strength of a 3% solution of H2O2
Answer: 100 ml of H2O2 solution contain H2O2 = 3g.
.’. 1000 ml of H2O2 solution will contain = 3/100x 1000 = 30g

NCERT Solutions for Class 11 Chemistry Chapter 9 HOTS Questions

Question 1. Account for the following:
(a) Can phosphorus with electronic configuration 3s2 3p3 form PH5?
(b) Water is responsible for moderation of body temperature. How?
(c) Hard water is not suitable for boilers as well as for laundary.
Answer:  (a) High ∆aH value of dihydrogen and less negative value of ∆eg H of hydrogen do not favour to exhibit highest oxidation state of P and consequently the formation of PH5, although P exhibit +3, +5 oxidation states.
(b) Because of high heat of vapourisation and high heat capacity.
(c) Hard water form precipitate with soap and deposition of salts in the form of scales.

Question 2. Can we use concentrated sulphuric acid and pure zinc in the preparation of dihydrogen?Write the chemical reactions to show the amphoteric nature of water. Why is hydrogen peroxide stored in wax-lined plastic coloured bottles ?
Answer:  (a) Cone. H2S04 cannot be used because it acts as an oxidizing agent also and gets reduced to SO2.
Zn + 2H2S04 (Cone.) ———> ZnS04+ 2H2O + SO2
Pure Zn is not used because it is non-porous and reaction will be slow. The impurities in Zn help in constitute of electrochemical couple and speed up reaction.
(b) Water is amphoteric in nature and it behaves both as an acid as well as base. With acids stronger than itself (e.g., H2S) it behaves as a base and with bases stronger than itself (e.g., NH3) it acts as an acid.
(i) As a base: H2O(I) + H2S(aq) ——-> H3O(aq) + HS–(aq)
(ii) As an acid: H2O(I) + NH3(aq) ———> OH–(aq) + NH4+(aq)
(c) The decomposition of H2O2 occurs readily in the presence of rough surface (acting as catalyst). It is also decomposed by exposure of light. Therefore, waxlined smooth surface and coloured bottles retard the decomposition of H2O2.

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