मराठी
Tamil Nadu Board of Secondary EducationHSC Science Class 12
पाठ्यपुस्तक उत्तरे१०९५२
संकल्पना स्पष्टीकरण११३
अभ्यासक्रम

Chemistry HSC Science Class 12 Tamil Nadu Board of Secondary Education Syllabus 2025-26

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Tamil Nadu Board of Secondary Education Class 12 Chemistry Syllabus - Free PDF Download

Tamil Nadu Board of Secondary Education Syllabus 2025-26 Class 12: The Tamil Nadu Board of Secondary Education Class 12 Chemistry Syllabus for the examination year 2025-26 has been released by the Tamil Nadu Board, Tamil Nadu Board of Secondary Education. The board will hold the final examination at the end of the year following the annual assessment scheme, which has led to the release of the syllabus. The 2025-26 Tamil Nadu Board of Secondary Education Class 12 Chemistry Board Exam will entirely be based on the most recent syllabus. Therefore, students must thoroughly understand the new Tamil Nadu Board of Secondary Education syllabus to prepare for their annual exam properly.

The detailed Tamil Nadu Board of Secondary Education Class 12 Chemistry Syllabus for 2025-26 is below.

Academic year:

Tamil Nadu Board of Secondary Education Class 12 Chemistry Revised Syllabus

Tamil Nadu Board of Secondary Education Class 12 Chemistry Course Structure 2025-26 With Marking Scheme

#Unit/TopicWeightage
1  Metallurgy 
2  p-block Elements-I 
3  p-block Elements - II 
4  Transition and Inner Transition Elements 
5  Coordination Chemistry 
6  Solid State 
7  Chemical Kinetics 
8  Ionic Equilibrium 
9  Electro Chemistry 
10  Surface Chemistry 
11  Hydroxy Compounds and Ethers 
12  Carbonyl Compounds and Carboxylic Acids 
13  Organic Nitrogen Compounds 
14  Biomolecules 
15  Chemistry in Everyday Life 
 Total -
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Syllabus

1 Metallurgy
2 p-block Elements-I
  • General Trends in Properties of p-block Elements  
    • Electronic configuration and oxidation state
    • Metallic nature
    • Ionisation Enthalpy
    • Electronegativity
    • Anomalous properties o f the first elements:
    • Inert pair effect
    • Allotropism in p-block elements
  • Group 13 (Boron Group) Elements  
    • Occurrence
    • Physical properties
    • Chemical properties of boron
    • Borax [Na2B4O7.10H2O]
    • Boric acid [H3BO3 or B(OH)3]
    • Diborane
    • Boron trifluoride
    • Aluminium chloride
    • Alums
  • Group 14 (Carbon Group) Elements  
    • Occurrence
    • Physical properties
    • Tendency for catenation
    • Allotropes of carbon
    • Carbon monoxide [CO]
    • Carbon dioxide
    • Silicon tetrachloride
    • Silicones
    • Silicates
    • Zeolites
3 p-block Elements - II
  • Group 15 (Nitrogen Group) Elements  
    • Occurrence
    • Physical properties
    • Nitrogen
    • Ammonia (NH3)
    • Nitric acid
    • Oxides and oxoacids of nitrogen
    • Allotropic forms of phosphorus
    • Properties of phosphorus
    • Phosphine (PH3) 
    • Phosphorous trichloride and pentachloride
    • Structure of oxides and oxoacids of phosphorus
  • Group 16 (Oxygen Group) Elements  
  • Oxygen  
    • Allotrophic forms of sulphur
    • Sulphur dioxide
    • Sulphuric acid: (H2SO4) 
  • Group 17 (Halogen Group) Elements  
    • Chlorine
    • Manufacture of chlorine
    • Hydrochloric acid
    • Trends in physical and chemical properties of hydrogen halides
    • Inter halogen compounds
    • Oxides of halogen
    • Oxoacids of halogens
  • Group 18 (Inert Gases) Elements  
    • Occurrence
4 Transition and Inner Transition Elements
  • Position of d- Block Elements in the Periodic Table  
  • Electronic Configuration  
  • General Trend in Properties  
    • Metallic behavior
    • Variation of atomic and ionic size
    • Ionization enthalpy
    • Oxidation state
    • Standard electrode potentials of transition metals
    • Magnetic properties
    • Catalytic properties
    • Alloy formation
    • Formation of interstitial compounds
    • Formation of complexes
  • D-block Elements  
    • Some Important Compounds of Transition Elements  
      • Oxides and Oxoanions of Metals 
      • Potassium dichromate K2Cr2O7
      • Chemical properties
      • Potassium permanganate - KMnO4
  • Electronic Configurations  
5 Coordination Chemistry
  • Coordination Compounds and Double Salts  
  • Werner’s Theory of Coordination Compounds  
  • Definition of Important Terms Pertaining to Co-ordination Compounds  
    • Coordination entity
    • Central atom/ion
    • Ligands
  • Nomenclature of Coordination Compounds  
  • Isomerism in Coordination Compounds  
  • Theories of Coordination Compound  
    • Valence Bond Theory
    • Crystal Field Theory
    1. Crystal field splitting in octahedral complexes
    2. Crystal field splitting in tetrahedral complexes
    3. Crystal filed splitting Energy and nature of ligands
    4. Colour of the complex and crystal field splitting energy
  • Stability of Metal Complexes  
    • Stepwise formation constants and overall formation constants
  • Importance and Applications of Coordination Complexes  
6 Solid State
  • General Characteristics of Solids  
  • Classification of Solids  
    • Crystalline Solids
    • Amorphous Solids
    • Distinctions between Crystalline and Amorphous Solids
  • Classification of Crystalline Solids  
  • Crystal Lattices and Unit Cells  
    • Unit cell
    • Crystal lattice or space lattice
    • Two-dimensional lattice and unit cell
    • Three-dimensional lattice and unit cell
  • Primitive and Non-primitive Unit Cell  
    • Primitive (or) simple cubic unit cell (SC)
    • Body centered cubic unit cell (BCC)
    • Face centered cubic unit cell (FCC)
    • Calculations involving unit cell dimensions
    • Calculation of density
  • Packing in Crystals  
    • Linear arrangement of spheres in one direction
    • Two dimensional close packing
    • Simple cubic arrangement
    • Body centered cubic arrangement
    • The hexagonal and face centered cubic arrangement
  • Imperfection in Solids  
    • Schottky defect
    • Frenkel defect
    • Metal excess defect
    • Metal deficiency defect
    • Impurity defect
7 Chemical Kinetics
8 Ionic Equilibrium
  • Acids and Bases in Daily Life  
  • Ionisation of Water  
  • The pH Scale  
  • Ionisation of Weak Acids  
    • Ostwald’s dilution law
  • Common Ion Effect  
  • Buffer Solutions  
  • Ionic Equilibria  
    • Salt Hydrolysis  
      • Salts of strong acid and a strong base
      • Hydrolysis of Salt of strong base and weak acid (Anionic Hydrolysis)
      • Hydrolysis of salt of strong acid and weak base (Cationic Hydrolysis)
      • Hydrolysis of Salt of weak acid and weak base (Anionic & Cationic Hydrolysis)
  • Solubility Product  
    • Solubility product  
9 Electro Chemistry
  • Conductivity of Electrolytic Solution  
    • Molar conductivity (Λm)
    • Equivalent conductance (Λ)
    • Factors affecting electrolytic conductance
    • Measurement of conductivity of ionic solutions 
  • Variation of Molar Conductivity with Concentration  
    • Debye - Huckel and Onsager equation
    • Kohlraush's law
  • Electrochemical Cells  
  • Thermodynamics of Cell Reactions  
    • Nernst equation
    • Electrolytic cell and electrolysis
    • Cell reactions
    • Faraday’s Laws of electrolysis
    • Electrochemical equivalent and molar mass
    • Batteries
    1. Leclanche cell
    2. Mercury button cell
    3. Secondary batteries
    4. Recharge of the cell
    5. The lithium-ion Battery
    6. Fuel cell
    • Corrosion
    1. Electrochemical mechanism of corrosion
    • Electrochemical series
10 Surface Chemistry
  • Adsorption and Absorption  
    • Characteristics of adsorption
    • Types of adsorption
    • Factors affecting adsorption
    1. Surface area of adsorbent
    2. Nature of adsorbate
    3. Pressure
    4. Concentration at a given temperature
    • Adsorption isotherms and isobars
  • Catalysis  
    • Catalyst
    • Catalysis and Theories of Catalysis
    • Homogeneous Catalysis
    • Heterogeneous Catalysis
    • Inhibitors
    • Enzyme Catalysis  
      • Enzymes
      • Characteristics of enzymes
      • Mechanism of enzyme catalysis
      • Examples of enzyme catalysed reactions
  • Zeolite Catalysis  
  • Colloid, Dispersion Phase and Dispersion Medium  
    • Classifications of Colloidal solution
    • Preparation of Colloids
    • Purification of colloids
    • Properties of Colloids
  • Emulsions  
    • Emulsion
    • Types of emulsions
      1) Oil-in-water emulsion (O/W type)
      2) Water-in-oil emulsion (W/O type)
    • Properties of emulsions
    • Deemulsification
  • Various Application of Colloids  
11 Hydroxy Compounds and Ethers
  • Classification of Alcohols  
    • Classification of alcohols
    • On the basis of number of -OH groups
    1. Monohydric alcohol
    2. Dihydric alcohol
    3. Trihydric alcohol
    4. Polyhydric alcohol
    • On the basis of nature of C-OH bond
    1. Csp3 - OH bond: Alkyl, Allylic, Benzylic alcohols
    2. Csp2 - OH bond
  • Nomenclature  
    • Definition: Nomenclature
    • Key Points: Nomenclature of Carbon Compounds
  • Reactions of Benzene Ring  
    • Electrophilic aromatic substitution
    • Test to differentiate alcohol and phenols
    • Structure of functional group
    • IUPAC System
  • Preparation of Ethers  
12 Carbonyl Compounds and Carboxylic Acids
  • Nomenclature of Aldehydes and Ketones  
  • Structure of Carbonyl Group  
  • General Methods of Preparation of Aldehydes and Ketones  
    • Preparation of aldehydes and ketones
    • Preparation of aldehydes
    • Preparation of benzaldehyde
    • Preparation of ketones
  • Physical Properties of Aldehydes and Ketones  
  • Chemical Properties of Aldehydes and Ketones  
  • Test for Aldehydes  
    • Tollen's Reagent Test
    • Fehling's solution Test
    • Benedict's solution Test
    • Schiff's reagent Test
  • Uses of Aldehydes and Ketones  
  • IUPAC Nomenclature of Carboxylic Acids  
  • Acids  
  • Physical Properties of Carboxylic Acids  
  • Chemical Properties of Carboxylic Acids  
  • Acidity of Carboxylic Acids  
  • Functional Derivatives of Carboxylic Acids  
    • Relative reactivity of Acid derivatives
    • Nomenclature
    • Acid Halides
    • Acid anhydride
    • Esters
  • Uses of Carboxylic Acids and Its Derivatives  
    • Formic acid
    • Acetic acid
    • Benzoic acid
    • Acetyl Chloride
    • Acetic anhydride
    • Ethyl acetate
13 Organic Nitrogen Compounds
14 Biomolecules
  • Biomolecules in the Cell > Carbohydrates  
  • Biomolecules in the Cell > Proteins  
  • Biomolecules in the Cell > Lipids  
    • Lipids
    1. Saturated fatty acids
    2. Unsaturated Fatty Acids 
    • Simple Lipids
    • Compound lipids
    • Sterols
    • Biological importance of lipids
  • Introduction of Vitamins  
  • Chemical Coordination  
15 Chemistry in Everyday Life
  • Drug  
    • Classification of drugs
    • Drug–target Interaction
  • Food Additives  
    • Important categories of food additives
    • Preservatives
    • Antioxidants
    • Sugar Substituents
    • Artificial sweetening agents
  • Cleansing Agents  
    • Types of cleansing agents
      a) Soaps
      b) Synthetic detergents
    • Mechanism of cleansing action
    • Differences between soaps and detergents
  • Introduction to Polymers  

Textbook SolutionsVIEW ALL [1]

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