Course Content
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
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
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
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
Class 11th Chemistry Online Class: Elevate Your CBSE Board Success
About Lesson

Smog and Photochemical smog

  • Smog is formed by combination of smoke and fog.
  • A thick fog-like layer in the atmosphere, especially during winters it is known as smog as it is made up of smoke and fog.
  • Smoke may contain oxides of nitrogen which combine with other air pollutants and fog to form smog. The smog causes breathing difficulties such as asthma, cough and wheezing in children
Environmental Chemistry Class 11th Notes & Solution
Environmental Chemistry

Photochemical smog

  • It is caused due to hydrocarbons and nitric oxide.When their concentration rises beyond limit a chain reaction occur from their interaction with sunlight in which NO is converted into nitrogen dioxide.
  • This nitrogen dioxide in turn absorbs energy and breaks into nitric oxide and free oxygen atoms.
  • These oxygen atoms combine with oxygen gas molecules to produce ozone .This ozone is a toxic gas it combines with un-burnt hydrocarbons in air to produce chemicals like formaldehyde, acrolein and PAN.

Harmful effects of photochemical smog

  • It causes serious earth problems
  • Ozone and PAN are eye irritant
  • Ozone and nitric oxide irritate nose, throat, causes dryness in throat, cough and difficulty in breathing.The smog leads to cracking of rubber and extensive damage to plant life.

Photochemical smog can be controlled as:-

  • Plantation of certain plants like pinesetc can metabolise nitrogen dioxide and Catalytic convertors which prevent the release of nitrogen oxide and hydrocarbons should be used in vehicles
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