CBSE Class 12 Chemistry Syllabus 2022-23

Class 12 Chemistry Syllabus 2022-23

CBSE Class 12 Chemistry syllabus 2022-23 has been released on the official website of CBSE students can download the PDF format from the official website. Here, in this article, we have included all the relevant details and the marking scheme for the Chemistry paper for class 12th. Class 12 is the last stage of higher secondary education and Chemistry is one of the course subjects. From all the experience we all know that Chemistry is a very important subject to score good marks and good percentage in the board exams.

Class 12 Chemistry Syllabus 2022-23: Overview

The main exam is the external assessment is 80 marks and the internal assessment that includes listening and speaking skills and project work are 20 marks in total the board exam is 100 marks. To score well out of 100 marks students must go through the CBSE Class 12th Chemistry syllabus 2022-23

CBSE Class 12 Chemistry Syllabus 2023
Title No. of Periods Marks
Solutions 15 7
Electrochemistry 18 9
Chemical Kinetics 15 7
d -and f -Block Elements 18 7
Coordination Compounds 18 7
Haloalkanes and Haloarenes 15 6
Alcohols, Phenols and Ethers 14 6
Aldehydes, Ketones and Carboxylic Acids 15 8
Amines 14 6
Biomolecules 18 7
Total 160 70

CBSE Class 12 Chemistry Syllabus 2022-23: Unitwise

CBSE Class 12 Chemistry Syllabus 2022-23: Unit 1

Unit 1: Solutions

Types of solutions, expression of concentration of solutions of solids in liquids, solubility of gases in liquids, solid solutions, Raoult’s law, colligative properties – relative lowering of vapour pressure, elevation of boiling point, depression of freezing point, osmotic pressure, determination of molecular masses using colligative properties, abnormal molecular mass, Van’t Hoff factor.

CBSE Class 12 Chemistry Syllabus 2022-23: Unit 2

Unit 2: Electrochemistry

Redox reactions, EMF of a cell, standard electrode potential, Nernst equation and its
application to chemical cells, Relation between Gibbs energy change and EMF of a cell,
conductance in electrolytic solutions, specific and molar conductivity, variations of
conductivity with concentration, Kohlrausch’s Law, electrolysis and law of electrolysis
(elementary idea), dry cell-electrolytic cells and Galvanic cells, lead accumulator, fuel
cells, corrosion.

CBSE Class 12 Chemistry Syllabus 2022-23: Unit 3

Unit 3: Chemical Kinetics

Rate of a reaction (Average and instantaneous), factors affecting rate of reaction: concentration, temperature, catalyst; order and molecularity of a reaction, rate law and specific rate constant, integrated rate equations and half-life (only for zero and first order reactions), concept of collision theory (elementary idea, no mathematical treatment), activation energy, Arrhenius equation.

CBSE Class 12 Chemistry Syllabus 2022-23: Unit 4

Unit 4: d and f Block Elements

General introduction, electronic configuration, occurrence and characteristics of transition metals, general trends in properties of the first-row transition metals – metallic character, ionization enthalpy, oxidation states, ionic radii, colour, catalytic property, magnetic, properties, interstitial compounds, alloy formation, preparation and properties of K2Cr2O7 and KMnO4.

Lanthanoids: Electronic configuration, oxidation states, chemical reactivity and lanthanoid contraction and its consequences.

Actinoids: Electronic configuration, oxidation states and comparison with lanthanoids.

CBSE Class 12 Chemistry Syllabus 2022-23: Unit 5

Unit 5: Coordination Compounds 

Coordination compounds – Introduction, ligands, coordination number, colour, magnetic properties and shapes, IUPAC nomenclature of mononuclear coordination compounds. Bonding, Werner’s theory, VBT, and CFT; structure and stereoisomerism, the importance of coordination compounds (in qualitative analysis, extraction of metals and biological system).

CBSE Class 12 Chemistry Syllabus 2022-23: Unit 6

Unit 6: Haloalkanes and Haloarenes

Haloalkanes: Nomenclature, nature of C–X bond, physical and chemical properties, optical rotation mechanism of substitution reactions.

Haloarenes: Nature of C–X bond, substitution reactions (Directive influence of halogen in monosubstituted compounds only). Uses and environmental effects of – dichloromethane, trichloromethane, tetrachloromethane, iodoform, freons, DDT.

CBSE Class 12 Chemistry Syllabus 2022-23: Unit 7

Unit 7: Alcohols, Phenols and Ethers 

Alcohols: Nomenclature, methods of preparation, physical and chemical properties (of primary alcohols only), identification of primary, secondary and tertiary alcohols, mechanism of dehydration, uses with special reference to methanol and ethanol.

Phenols: Nomenclature, methods of preparation, physical and chemical properties, acidic nature of phenol, electrophilic substitution reactions, uses of phenols.

Ethers: Nomenclature, methods of preparation, physical and chemical properties, uses.

CBSE Class 12 Chemistry Syllabus 2022-23: Unit 8

Unit 8: Aldehydes, Ketones and Carboxylic Acids

Aldehydes and Ketones: Nomenclature, nature of carbonyl group, methods of preparation, physical and chemical properties, mechanism of nucleophilic addition, reactivity of alpha hydrogen in aldehydes, uses.

Carboxylic Acids: Nomenclature, acidic nature, methods of preparation, physical and chemical properties; uses.

CBSE Class 12 Chemistry Syllabus 2022-23: Unit 9

Unit 9: Amines 

Amines: Nomenclature, classification, structure, methods of preparation, physical and chemical properties, uses, identification of primary, secondary and tertiary amines.

Diazonium salts: Preparation, chemical reactions and importance in synthetic organic chemistry.

CBSE Class 12 Chemistry Syllabus 2022-23: Unit 10

Unit 10: Biomolecules

Carbohydrates: Classification (aldoses and ketoses), monosaccharides (glucose and fructose), D L configuration oligosaccharides (sucrose, lactose, maltose), polysaccharides (starch, cellulose, glycogen); Importance of carbohydrates.

Proteins: Elementary idea of – amino acids, peptide bond, polypeptides, proteins, structure of proteins – primary, secondary, tertiary structure and quaternary structures (qualitative idea only), denaturation of proteins; enzymes. Hormones – Elementary idea excluding structure.

Vitamins: Classification and functions.
Nucleic Acids: DNA and RNA.

Note: The content indicated in NCERT textbooks as excluded for the year 2022-23 is not to be tested by schools.

CBSE Class 12 Chemistry Syllabus 2022-23: Practicals

Evaluation Scheme for Examination Marks
Volumetric Analysis 8
Salt Analysis 8
Content-Based Experiment 6
Project Work 4
Class record and viva 4
Total 30

List of Class 12 Chemistry Practicals

Micro-chemical methods are available for several of practical experiments. Wherever possible, such techniques should be used.

A. Surface Chemistry

(a) Preparation of one lyophilic and one lyophobic sol

Lyophilic sol – starch, egg albumin and gum

Lyophobic sol – aluminium hydroxide, ferric hydroxide, arsenous sulphide.

(b) Dialysis of sol-prepared in (a) above.

(c) Study of the role of emulsifying agents in stabilizing the emulsion of different oils.

B. Chemical Kinetics

(a) Effect of concentration and temperature on the rate of reaction between Sodium Thiosulphate and Hydrochloric acid.

(b) Study of reaction rates of any one of the following:

(i) Reaction of Iodide ion with Hydrogen Peroxide at room temperature using different concentrations of Iodide ions.

(ii) Reaction between Potassium Iodate, (KIO3) and Sodium Sulphite: (Na2SO3) using starch solution as an indicator (clock reaction).

C. Thermochemistry

Any one of the following experiments

(a) Enthalpy of dissolution of Copper Sulphate or Potassium Nitrate.

(b) Enthalpy of neutralization of strong acid (HCI) and strong base (NaOH).

(c) Determination of enthaply change during interaction (Hydrogen bond formation) between Acetone and Chloroform.

D. Electrochemistry

Variation of cell potential in Zn/Zn2+|| Cu2+/Cu with change in concentration of electrolytes (CuSO4 or ZnSO4) at room temperature.

E. Chromatography

(a) Separation of pigments from extracts of leaves and flowers by paper chromatography and determination of Rf values.

(b) Separation of constituents present in an inorganic mixture containing two cations only (constituents having large difference in Rf values to be provided).

F. Preparation of Inorganic Compounds

Preparation of double salt of Ferrous Ammonium Sulphate or Potash Alum. Preparation of Potassium Ferric Oxalate.

G. Preparation of Organic Compounds

Preparation of any one of the following compounds

i) Acetanilide ii) Di -benzalAcetone iii) p-Nitroacetanilide iv) Aniline yellow or 2 – Naphthol Anilinedye.

H. Tests for the functional groups present in organic compounds: Unsaturation, alcoholic, phenolic, aldehydic, ketonic, carboxylic and amino (Primary) groups.

I. Characteristic tests of carbohydrates, fats and proteins in pure samples and their detection in given foodstuffs.

J. Determination of concentration/ molarity of KMnO4 solution by titrating it against a standard solution of:

(a) Oxalic acid,

(b) Ferrous Ammonium Sulphate

(Students will be required to prepare standard solutions by weighing themselves).

K. Qualitative analysis

Determination of one anion and one cation in a given salt

Cation: Pb2+, Cu2+ As3+, Aℓ3+, Fe3+, Mn2+, Zn2+, Ni2+, Ca2+, Sr2+, Ba2+, Mg2+, NH4+
Anions: (CO3)2-, S2-, (SO3)2-, (NO2)-, (SO4)2-, Cℓ-, Br-, I-, (PO4)3-, (C2O4)2-, CH3COO-, NO3-

(Note: Insoluble salts excluded)

CBSE Class 12 Chemistry Syllabus 2022-23: Investigatory Project 

Scientific investigations involving laboratory testing and collecting information from other sources A few suggested Projects.

  • Study of the presence of oxalate ions in guava fruit at different stages of ripening.
  • Study the quantity of casein present in different samples of milk.
  • Preparation of soybean milk and its comparison with natural milk with respect to curd formation, the effect of temperature, etc.
  • Study of the effect of Potassium Bisulphate as a food preservative under various conditions (temperature, concentration, time, etc.)
  • Study of digestion of starch by salivary amylase and effect of pH and temperature on it.
  • Comparative study of the rate of fermentation of the following materials: wheat flour, gram flour, potato juice, carrot juice, etc.
  • Extraction of essential oils present in Saunf (aniseed), Ajwain (carum), Illaichi (cardamom).
  • Study of common food adulterants in fat, oil, butter, sugar, turmeric power, chilli powder and pepper.

Note: Any other investigatory project, which involves about 10 periods of work, can be chosen with the approval of the teacher.

Practical Examination for Visually Impaired Students of Class 12 Chemistry Syllabus

Evaluation Scheme

Topic Marks
Identification/Familiarity with the apparatus 5
Written test (based on given/prescribed practicals) 10
Practical Record 5
Viva 10
Total 30

General Guidelines

  • The practical examination will be of two hours duration.
  • A separate list of ten experiments is included here.
  • The written examination in practicals for these students will be conducted at the time of the practical examination of all other students.
  • The written test will be of 30 minutes duration.
  • The question paper given to the students should be legibly typed. It should contain a total of 15 practical skill-based very short answer type questions. A student would be required to answer any 10 questions.
  • A writer may be allowed to such students as per CBSE examination rules.
  • All questions included in the question papers should be related to the listed practical. Every question should require about two minutes to be answered.
  • These students are also required to maintain a practical file. A student is expected to record at least five of the listed experiments as per the specific instructions for each subject. These practicals should be duly checked and signed by the internal examiner.
  • The format of writing any experiment in the practical file should include aim, apparatus required, simple theory, procedure, related practical skills, precautions etc.
  • Questions may be generated jointly by the external/internal examiners and used for assessment.
  • The viva questions may include questions based on basic theory/principle/concept, apparatus/materials/ chemicals required, procedure, precautions, sources of error etc.

1. Items for Identification/Familiarity of the apparatus for assessment in practical (All experiments)

Beaker, glass rod, tripod stand, wire gauze, Bunsen burner, Whatman filter paper, gas jar, capillary tube, pestle and mortar, test tubes, tongs, test tube holder, test tube stand, burette, pipette, conical flask, standard flask, clamp stand, funnel, filter paper

Hands-on Assessment

  • Identification/familiarity with the apparatus
  • Odour detection in qualitative analysis

2. List of Practicals
The experiments have been divided into two sections: Section A and Section B. The experiments mentioned in Section B are mandatory.

Section A

A Surface Chemistry

  1. Preparation of one lyophilic and one lyophobic sol – starch, egg albumin and gum
  2. Preparation of one lyophobic sol– Ferric hydroxide

B Chromatography

Separation of pigments from extracts of leaves and flowers by paper chromatography and determination of Rf values (distance values may be provided).

C Tests for the functional groups present in organic compounds:

(1) Alcoholic and Carboxylic groups.

(2) Aldehydic and Ketonic

D Characteristic tests of carbohydrates and proteins in the given foodstuffs.

E Preparation of Inorganic Compounds- Potash Alum

Section B(Mandatory)

F Quantitative analysis

(1)(a) Preparation of the standard solution of Oxalic acid of a given volume

(b) Determination of molarity of KMnO4 solution by titrating it against a standard solution of Oxalic acid.

(2) The above exercise [F 1 (a) and (b)] to be conducted using Ferrous ammonium sulphate (Mohr’s salt)

G Qualitative analysis:

(1) Determination of one cation and one anion in a given salt. Cation –NH4+
Anions: CO32-, S2-, SO32-, Cl-, CH3COO-
(Note: Insoluble salts excluded)

Note: The above practical may be carried out in an experiential manner rather than recording observations.

Reference Books for CBSE Class 12 Chemistry Syllabus 2022-23

1. Chemistry Part -I, Class-XII, Published by NCERT.

2. Chemistry Part -II, Class-XII, Published by NCERT.

3. Laboratory Manual of Chemistry, Class XI Published by NCERT

4. Other related books and manuals of NCERT including multimedia and online sources

Question Paper Design Given in CBSE Class 12 Chemistry Syllabus 2022-23

Domains Marks %
Remembering and Understanding: Exhibit memory of previously learned material by recalling facts, terms, basic concepts and answers. Demonstrate understanding of facts and ideas by organizing, comparing, translating, interpreting, giving descriptions and stating main ideas. 28 40
Applying: Solve problems to new situations by applying acquired knowledge, facts, techniques and rules in a different way. 21 30
Analyzing, Evaluating and Creating: Examine and break information into parts by identifying motives or causes. Make inferences and find evidence to support generalizations. Present and defend opinions by making judgments about information, the validity of ideas or quality of work based on a set of criteria. Compile information together in a different way by combining elements in a new pattern or proposing alternative solutions. 21 30

 

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