TN Board Class 12 Chemistry Syllabus – Latest 2022-2023

Chemistry is the kind of subject that sometimes seems difficult to understand. Hence, students may feel under confident while preparing for the Chemistry subject syllabus. However, Chemistry is one of the most important subjects at the Class 12 level, and it is important to score good marks in Chemistry. After learning Chemistry concepts, Class 12 students will have an opportunity to have a career in Biochemistry, Organic Chemistry, Polymer Chemistry, etc. It is advised to first go through the Tamil Nadu Class 12 Chemistry syllabus and get an understanding of the topics covered. Class 12 students of the Board of Higher Secondary Education can make use of the Tamil Nadu Sample Question Paper and Tamil Nadu Previous Year Question Paper to prepare effectively for the Class 12 Chemistry exam. Practising past years’ question papers is necessary for understanding the paper pattern and marks distribution. The students have to study some broad concepts like Metallurgy, Coordination Chemistry, Transition and inner transition elements, etc., in the Tamil Nadu Class 12 Chemistry syllabus.

Tamil Nadu Board (TN HSC) Chemistry Syllabus for Class 12

The Class 12 students of Tamil Nadu State Board can access the Tamil Nadu Class 12 Chemistry syllabus from Extramarks’ website and mobile application in a PDF form. The students can also access other important study materials from the Extramarks website and mobile application and enhance their Chemistry preparations for scoring higher marks in the boards examination.

The students are advised to go through the Tamil Nadu Class 12 Chemistry syllabus to acknowledge the chapters they have to study for their Tamil Nadu State Board Examination in Chemistry. This will help them in coming up with a strategy to prepare well for the Chemistry exam.

Tamil Nadu Board (TN HSC) Chemistry Latest Syllabus for Class 12

The Class 12 students belonging to the Board of Higher Secondary Education can access the latest Tamil Nadu Class 12 Chemistry syllabus from Extramarks’ learning platform in PDF format. Extramarks is providing very authentic and reliable study materials for students studying in all the classes. All these study materials are accessible on Extramarks’ website and mobile application. Tamil Nadu Class 12 Chemistry syllabus helps in understanding the weightage of chapters and students can focus on the topics that carry more marks. The students are advised to refer to the Tamil Nadu Class 12 Chemistry syllabus to understand their strengths and weaknesses in the Chemistry syllabus and spend extra time on weaker areas. The students can access the Chemistry past years’ question paper to prepare effectively for chapters given in the Tamil Nadu Class 12 Chemistry syllabus. It is important to plan the syllabus topics when dealing with a vast subject like Chemistry, Class 12 Students of Tamil Nadu State Board need to strategize which topics need to be covered first and which have to be learnt later. The Tamil Nadu Class 12 Chemistry syllabus consists of some of the crucial topics that are important for learning Chemistry at upper levels and making a career as a Chemical Analyst, Production Chemist, Food and Drug Inspector, etc.

SYLLABUS 2021-2022
STANDARD: 12                                             SUBJECT : CHEMISTRY

1.Metallurgy Introduction
1.1 Occurrence of metals
1.1.1     Mineral and ore
1.2      Concentration of ores
1.2.1      Gravity separation or Hydraulic wash
1.2.2   Froth flotation
1.2.3     Leaching
Cyanide leaching
Recovery of metal of interest from the complex by reduction
Ammonia leaching
Alkali leaching
Acid leaching
1.2.4 Magnetic separation
1.3      Extraction of crude metal
1.3.1      Conversion of ores into oxides
1.3.2 Reduction of metal oxides
Reduction by carbon:
Reduction by hydrogen
Reduction by metal:
1.6     Refining process
1.6.1     Distillation
1.6.2     Liquation
1.6.3    Electrolytic refining
1.6.4 Zone Refining
1.6.5 Vapour phase method
Mond process for refining nickel
Van-Arkel method for refining zirconium/ titanium
2. P-block Introduction
elements    -I 2.1     General trends in properties of p-block


2.1.1     Electronic configuration and oxidation state
2.1.2       Metallic nature:
2.1.3   Ionisation Enthalpy


2.1.4 Electronegativity

2.1.5 Anomalous properties of the first elements

2.1.6 Inert pair effect

2.1.7 Allotropism in p-block elements

2.2 Group 13 (Boron group) elements

2.2.1 Occurrence

2.2.2 Physical properties

2.2.3 Chemical properties of boron

Uses of boron

2.2.4 Borax [Na2B407.10H20)

Preparation Properties

Uses of Borax

2.2.5 Boric acid [H3B03 or B(OH)31

Preparation. Properties

Structure of Boric acid

Uses of boric acid

2.2.9 Alums


Preparation Properties of Alum

Uses of Alum

2.3 Group 14 (Carbon group) elements:

2.3.1 Occurrence

2.3.2 Physical properties

2.3.3 Tendency for catenation

2.3.4 Allotropes of carbon

Structure of Graphite

Structure of Diamond

Structure of Fullerenes

Structure of carbon nanotubes

Structure of Graphene

2.3.8 Silicones


Types of silicones

Properties, Uses

3. P-block

elements -II


3.1 Group 15 (Nitrogen group) elements

3.1.1 Occurrence

3.1.2 Physical properties

3.1.3 Nitrogen


Properties of Nitrogen

Uses of nitrogen


3.1.4 Ammonia(NH3)


Properties of Ammonia

Chemical Properties

Structure of ammonia

3.1.7 Allotropic forms of phosphorus

3.1.8 Properties of phosphorus

Uses of phosphorus

Oxoacids of Phosphorus-Structure

Group 16 (Oxygen group) elements


Physical properties

3.2 Oxygen

Preparation: Properties

Chemical properties Uses

of Oxygen

3.2.1 Allotropic forms of sulphur

3.2.2 Sulphur dioxide Preparation Properties Chemical properites Uses of sulphur dioxide

Structure of sulphur dioxide

Structure of oxoacids of sulphur

3.3 Group 17 (Halogen group) elements:

3.3.1 Chlorine


Physical properties of Chlorine

3.3.1 Manufacture of chlorine Physical properties Chemical properties Uses of chlorine

3.3.4 Inter halogen compounds:

Properties of inter halogen compounds

Structure of inter halogen compounds

3.4 Group 18 (Inert gases) elements:

3.4.1 Occurrence:

Physical properties

Physical properties-Inert Gases Properties of inert gases Chemical Properties

Structures of compounds of Xenon Uses of noble gases


4. Transition and inner transition elements Introduction

4.1 Position of d- block elements in the periodic table

4.2 Electronic configuration

4.3 General trend in properties

4.3.1 Metallic behavior

4.3.2 Variation of atomic and ionic size

4.3.3 Ionization enthalpy

4.3.4 Oxidation state

4.3.5 Standard electrode potentials of transition metals

4.3.6 Magnetic properties

4.3.7 Catalytic properties

4.3.8 Alloy formation

4.3.9 Formation of interstitial compounds

4.3.10 Formation of complexes

4.4 Important compound of Transition elements f-block elements – Inner transition elements The position of Lanthanoids in the periodic table

Electronic configuration of Lanthanoids Oxidation state of lanthanoids

Atomic and ionic radii

Causes of lanthanoid contraction Consequences of lanthanoid contraction Actinoids

Electronic configuration of actinoids Oxidation state of actinoids Differences between lanthanoids and actinoids

5. Coordination chemistry



5.1 Coordination compounds and double salts

5.2 Werner’s theory of coordination compounds Postulates Werner’s theory

5.2.1 Limitations of Werner’s theory

5.3 Definition of important terms pertaining to co-ordination compounds

5.3.1 Coordination entity

5.3.2 Central atom/ion

5.3.3 Ligands Coordination sphere, Coordination polyhedron, Coordination number, Oxidation state (number)

Types of complexes

Classification based on the net charge on the complex

Classification based on kind of ligands

5.4 Nomenclature of coordination compounds

a. Naming the ligands

b. Naming the central metal

More examples with names – IUPAC Nomenclature

5.6 Theories of coordination compound

5.6.1 Valence Bond Theory

Main assumptions of VBT

Illustration(1 -4)

Limitations of VBT

6. Solid state 6. Introduction

6.1   General characteristics of solids

6.2. Classification of Solids

6.3. Classification of Crystalline Solids

6.3.1. Ionic solids

6.3.2. Covalent Solids

6.3.3. Molecular Solids

6.3.4. Metallic Solids

6.4. Crystal lattice and unit cell

6.5 Primitive and Non Primitive unit
6.5.1 Primitive (or) Simple Cube unit cell

6.5.2 Body Centered cubic unit cell

6.5.3 Face centered cubic unit cell

6.5.4 Calculations involving unit cell Dimensions

6.5.5 Calculation of density

6.6 Packing in Crystals

6.6.1 Linear arrangement of spheres in one direction

6.6.2 Two dimensional Close Packing

6.6.3 Simple Cubic arrangement

6.6.4. Body Centered Cubic arrangement

6.7. Imperfections in solids

6.7.1 Schottky defect

6.7.2. Frenkel defect

6.7.3. Metal Excess defect

6.7.4. Metal Deficiency defect

6.7.5. Impurity defect

7. Chemical kinetics Introduction

7.1 Rate of Chemical reaction

7.1.1 Stoichiometry and rate of reaction

7.1.2 Average and instantaneous rate

7.3 Rate law and Rate Constant

7.4 Molecularity

7.5 Integrated Rate Equation

7.5.1 Integrated rate law for First order, Pseudo first order reaction

7.5.2 Integrated rate law for a Zero order reaction
7.6 Half life period of a reaction

7.8 Arrhenius Equation-The effect of temperature on reaction rate


8.lonic Equillibrium Introduction

8.1. Acids and bases

8.1.1 Arrhenius concept

8.1.2 Lowry – Bronsted Theory

8.1.3 Lewis Concept

8.2 Strength Of Acids and Bases

8.3 Ionisation of water

8.4 The pH Scale

8.4.1 Relation between pH and pOH

8.5 lonistion of Weak Acids

8.5.1 Ostwalds Dilution Law

8.6. Common ion effect

8.7 Buffer Solution

8.7.1 Buffer Action

8.7.3 Henderson Hasselbalch Equation

8.9 Solubility Product

8.9.1 Determination of solubility Product from Molar Solubility


9. Electro chemistry



9.1 Conductivity of electrolytic solution

9.1.1 Molar conductivity

9.1.2 Equivalent conductance

9.1.3 Factors affecting Electrolytic conductance

9.1.4 Measurement of conductivity of ionic solutions

9.2 Variation of molar conductivity with concentration

9.2.2 Kohlrausch’s law and Applications

9.3.2 Galvanic cell notation

9.3.4 Measurement of electrode potential

9.4 Thermodynamics of cell reactions

For viewing question paper please click here