CBSE Class 12 Chemistry Syllabus 2022-23

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CBSE Class 12 Chemistry Syllabus 2022-23 includes Solutions, Electrochemistry, Chemical Kinetics, d – and f – Block Elements, Coordination Compounds, Haloalkanes and Haloarenes, Alcohols, Phenols and Ethers, Aldehydes, Ketones and Carboxylic Acids etc for the session 2022 – 2023. Here is the detailed syllabus. To download class 12 Chemistry CBSE latest sample question papers for the 2023 exams, please install the myCBSEguide App which is the best mobile app for CBSE students. The myCBSEguide app not only provides you the CBSE class 12 Chemistry model question papers but it also provides class 12 Chemistry chapter-wise test papers, class 12 Chemistry best revision notes and other study material for class 12 Chemistry students.

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CBSE Class – 12
Chemistry (Code No. 043)
Syllabus (2022-23)


Time: 3 Hours
Max.Marks: 70 Marks

S.No.TitleNo. of PeriodsMarks
1.Solutions157
2.Electrochemistry189
3.Chemical Kinetics157
4.d – and f – Block Elements187
5.Coordination Compounds187
6.Haloalkanes and Haloarenes156
7.Alcohols, Phenols and Ethers146
8.Aldehydes, Ketones and Carboxylic Acids158
9.Amines146
10.Biomolecules187
Total16070

Unit II: Solutions (15 Periods)

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.

Unit III: Electrochemistry (18 Periods)

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.

Unit IV: Chemical Kinetics (15 Periods)

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.

Unit VIII: d and f Block Elements (18 Periods)

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.

Unit IX: Coordination Compounds (18 Periods)

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).

Unit X: Haloalkanes and Haloarenes (15 Periods)

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.

Unit XI: Alcohols, Phenols and Ethers (14 Periods)

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.

Unit XII: Aldehydes, Ketones and Carboxylic Acids (15 Periods)

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.

Unit XIII: Amines (14 Periods)

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.

Unit XIV: Biomolecules (18 Periods)

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.

PRACTICALS
3 HOURS/ 30 MARKS

Evaluation Scheme for ExaminationMarks
Volumetric Analysis08
Salt Analysis08
Content Based Experiment06
Project Work04
Class record and viva04
Total30

PRACTICAL SYLLABUS (60 Periods)

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

  1. Preparation of one lyophilic and one lyophobic sol
    Lyophilic sol – starch, egg albumin and gum
    Lyophobic sol – aluminium hydroxide, ferric hydroxide, arsenous sulphide.
  2. Dialysis of sol-prepared in (a) above.
  3. Study of the role of emulsifying agents in stabilizing the emulsion of different oils.

B. Chemical Kinetics

  1. Effect of concentration and temperature on the rate of reaction between Sodium Thiosulphate and Hydrochloric acid.
  2. Study of reaction rates of any one of the following:
    1. Reaction of Iodide ion with Hydrogen Peroxide at room temperature using different concentrations of Iodide ions.
    2. 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

  1. Enthalpy of dissolution of Copper Sulphate or Potassium Nitrate.
  2. Enthalpy of neutralization of strong acid (HCI) and strong base (NaOH).
  3. 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

  1. Separation of pigments from extracts of leaves and flowers by paper chromatography and determination of Rf values.
  2. 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

  1. Acetanilide
  2. Di -benzalAcetone
  3. p-Nitroacetanilide
  4. 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:

  1. Oxalic acid,
  2. 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, {tex}\mathrm{NO}_{3}^{-}{/tex}
(Note: Insoluble salts excluded)

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 Classes XI and XII
Evaluation Scheme

Time Allowed: Two hours
Max. Marks:30

TopicMarks
Identification/Familiarity with the apparatus5
Written test (based on given/prescribed practicals)10
Practical Record5
Viva10
Total30

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.

A. 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

B. 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. Preparation of the standard solution of Oxalic acid of a given volume
    2. Determination of molarity of KMnO4 solution by titrating it against a standard solution of Oxalic acid.
  1. 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 – {tex}\mathrm{NH}_{4}{ }^{+}{/tex}
    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.

PRESCRIBED BOOKS

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

QUESTION PAPER DESIGN CLASSES –XI and XII (2022-23)

S.NoDomainsMarks%
1Remembering 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.
2840
2Applying:
Solve problems to new situations by applying acquired knowledge, facts, techniques and rules in a different way.
2130
3Analyzing, 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.
2130

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