Course Content
CHAPTER 1: SOME BASIC CONCEPTS OF CHEMISTRY
0/13
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
0/7
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
0/6
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
MORE QUESTIONS SOLVED
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
0/10
Introduction || Kossel and Lewis Approach
15:00
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
MORE QUESTIONS SOLVED
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
0/10
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
MORE QUESTIONS SOLVED
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
0/8
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
0/7
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
0/6
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
0/8
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
0/7
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
0/6
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
0/13
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
MORE QUESTIONS SOLVED
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
0/10
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
0/11
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 14 Very Short Answer Type Questions

Question 1. What do you mean by primary and secondary pollutants of the air?
Answer:  Primary pollutants are those which after their formation remains as it was before e.g., NO. Secondary pollutants are formed as a reaction with primary pollutants e.g., PAN (peroxyacyl nitrates).

Question 2. What is the name of the compound formed when CO combines with blood?
Answer: Carboxyhaemoglobin.

Question 3. How are NO and NO2 formed in the atmosphere?
Answer: NO is formed due to the reaction between N2 and O2 during lightning or by the combustion of fossil fuels.NO is oxidised to form NO2.

Question 4. What is chlorosis?
Answer: Slowdown of process of formation of chlorophyll in plants with the presence of SO2 is called chlorosis.

Question 5. Which zone is known as ozonosphere?
Answer: Stratosphere.

Question 6. Which main gases is responsible for damage in ozone layer?
Answer: NO and CFCs

Question 7. What is the nature of classical smog?
Answer: Reducing.

Question 8. Name the acids which are responsible for acid rain?
Answer:  H2SO4, HNO3 and HCl.

Question 9. What is BOD?
Answer: The amount of oxygen consumed by micro organism in decomposing organic wastes of sewage water is called BOD (Biochemical Oxygen Demand).

Question 10. What do you mean by viable and non-viable particulates?
Answer:  Viable particulates are microorganisms like bacteria, fungi, moulds, algae etc. Non- viable particulates are formed by the disintegration of bigger size particles or by the condensation of water vapour, e.g., mist, smoke, fume and dust.

Question 11. What is siltation?
Answer: Mixing of soil or rock particles in water is called siltation.

Question 12. What is the composition of London Smog?
Answer:  London Smog consists H2SO4 deposited on the particulates suspended in the atmosphere.

Question 13. List out the gases which are considered as major source of air pollution.
Answer: Carbon monoxide (CO), sulphur dioxide (SO2) and oxides of nitrogen (NO2).

Question 14. Why is acid rain considered as threat to Taj Mahal ?
Answer: Acids present in acid rain can react with marble (CaCO3) and damage the monument.

Question 15. Give one example of organic herbicide.
Answer: Triazines.

Question 16. What are pesticides ?
Answer:  Pesticides are the substances used to kill unwanted pests. For example, DDT.

Question 17. What is PAN stands for?
Answer: It is peroxyacetyl nitrate.

Question 18. Give the examples of insecticides.
Answer:  DDT, BHC.

Question 19. Which gas was mainly responsible for Bhopal gas tragedy? 
Answer: Methyl isocyanate.

Question 20. What is meant by polar vortex?
Answer: A tight whirlpool of wind formed in the stratosphere which surrounds Antarctica is called polar vortex.

Question 21. What should be the tolerable limit of F ions in drinking water?
Answer: 1 ppm or 1 mg dm-3.

NCERT Solutions for Class 11 Chemistry Chapter 14 Short Answer Questions ( Environmental Chemistry )

Question 1. How did carbon monoxide act as a poison for human beings?
Answer: Carbon monoxide is poisonous because it combines with hemoglobin of R.B.C. to form carboxyhemoglobin as.

It inhibits the transport of oxygen to different parts of the body. Thus the body becomes oxygen-starved.

Question 2. What is ‘Acid Rain’? How is it harmful to the environment?
Answer:  Acid rain is the rain water mixed with small amount of sulphuric acid, nitric acid along with hydrochloric acid which are formed from the oxides of sulphur and nitrogen present in air as pollutants. It has a pH of 4-5.
Harmful effects of Acid Rain

  • It is toxic to vegetation and aquatic life.
  • It damages buildings and statues. Taj Mahal has been damaged by acid rain.
  • Acid rain corrodes water conducting pipes resulting in the leaching of heavy metals such as iron, lead, etc., to the drinking water.

Question 3. What is photochemical smog? What are its effects? How can it be controlled?
Answer:  This is a type of smog formed in warm, dry and sunny climate. They are formed when sunlight is absorbed by SO2, oxides of nitrogen and hydrocarbons.
They act as oxidising agents.
Effects of photochemical smog

  • They produce irritation in the eyes and also in respiratory system.
  • They can damage many materials such as metals, stones, building materials etc.
  • NO2 present gives a brown colour to the photochemical smog which reduces visibility.
  • It is harmful to fabrics, crops and ornamental plants.

Control of photochemical smog

  • By using catalytic converters in automobiles.
  • By spraying certain compounds into atmosphere which generate free radicals that can easily combine with the free radicals that initiate the reaction forming toxic compounds of photochemical smog.
  • Certain plants such as pinus, juniparus, pyrus could be helpul in this matter.

Question 4. What do you mean by greenhouse effect? What is the role of CO2 in the greenhouse effect?
Answer:  It is the phenomenon in which earth’s atmosphere traps the heat from the sun and prevents it from escaping in outer space. Gases such as CO2, methane, ozone, CFCs are believed to be responsible for this effect.Heat from the sun after being absorbed by the earth is absorbed by CO2 and then radiated back to the earth. Thus making the environment of the earth warm.

Question 5. (a) Define eutrophication and pneumoconiosis.
(b) Write difference between photochemical and classical smog.
Answer:  (a) Eutrophication: When the growth of algaes increases in the surface of water, dissolved oxygen in water is reduced. This phenomenon is known as eutrophication. (Due to this growth of fish gets inhibited).
Pneumoconiosis: It is a disease which irritates lungs. It causes scarring or fibrosis of the lung.
(b)

Photochemical smog Classical smog
(i) It is formed as a result of photochemical decomposition of nitrogen dioxide and chemical reactions involving hydrocarbons.
(ii) It takes place during dry warm season in presence of sunlight.
(iii) It is oxidising in nature.		 (i) It is formed due to condensation of SO, vapours on particles of carbon in cold climate.
(ii) It is generally formed during winter when there is severe cold.
(iii) It is reducing in nature.
Environmental Chemistry

NCERT Solutions for Class 11 Chemistry Chapter 14 Multiple Choice Questions

Question 1. Which of the following acid is most abundant in acid rain?
(a) HCl (b) HNO3 (c) H2SO4 (d)Organic acid
Question 2. Which of the following causes less pollution?
(a) NOx (b) SOx (c) CO2 (d) CxHy
Question 3. Besides CO2, the other greenhouse gas is
(a) Ar (b) N2 (C) O2 (d) CH4
Question 4. BOD is a measure of
(a) Organic pollutant in water (b) Inorganic pollutant in water
(c) Particulate matter in water (d) All of the above
Question 5. The gas which reacts with hemoglobin in blood is
(a) CO (b) SO2 (c) CO2 (d) NO2
Question 6. Ozone depletion is mainly due to
(a) HCFs (b) CFCs (c) CH3Br (d)all of the above
Question 7. The pollutant released in Bhopal gas tragedy was
(a) Ammonia (b) Mustard gas (c) Nitrous oxide (d) Methyl isocyanate
Question 8. Which of the following will increase the BOD of water supply?
(a) O3 (b) C2H5OH (C) H2O (d) CO2
Answer: 1.(c) 2. (c) 3. (d) 4. (a) 5. (a) 6.(b) 7. (d) 8. (c)

NCERT Solutions for Class 11 Chemistry Chapter 14 Hots Questions

Question 1. What is meant by PCBs?
Answer: PCBs are polychlorinated biphenyls. They are contaminants of water. They are used as fluids in transformers and capacitors.

Question 2. What is the compound formed when CO combines with blood?
Answer: When CO combines with blood, the following reaction occurs forming carboxyhaemoglobin:-
HB + CO —> (HBCO) Carboxyhaemoglobin

Question 3. Give three examples in which green chemistry has been applied.
Answer:

  • In dry-cleaning, use of liquefied CO2 in place of tetrachloroethene (Cl2C = CCl2).
  • In bleaching of paper using H2O2 in place of chlorine.
  • In the manufacture of chemicals like ethanal using environment-friendly chemicals and conditions.
Join the conversation
Previous
Next
Wisdom TechSavvy Academy