CBSE Class 12 syllabus has been released by the board for the AY 2022-23. As per the new CBSE Class 12 syllabus, the two-term system has been cancelled. Therefore, CBSE Class 12 Board Exam would be conducted as a single-stage final exam, like the pre covid era.

CBSE Class 12 term wise syllabus has been deleted and as for the Class 12 Chemistry syllabus, a comprehensive curriculum consisting of 10 units has been designed for the upcoming academic year.

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CBSE Class 12 Chemistry Syllabus

CBSE Class 12 Chemistry syllabus has given 70% weightage to theory and the remaining 30% to practicals. The new syllabus of CBSE Class 12 Chemistry for the AY 2022-23 is tabulated below.

Check CBSE 12^th Chemistry Previous Year Paper with answer key

Unit II - Solutions

The topics covered under Solutions chapter are:

• 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

The topics covered under Electrochemistry chapter are:

• 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

The topics covered under Chemical Kinetics chapter are:

• 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

The topics covered under d and f Block elements chapter are:

• 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

The topics covered under Coordination Compounds chapter are:

• 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
• Importance of coordination compounds (in qualitative analysis, extraction of metals and biological system). 

Unit X - Haloalkanes and Haloarenes

The topics covered under Haloalkenes and Haloarenes chapter are:

• 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 

The topics covered under the Alcohols, Phenols and Ethers chapter are:

• 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 

The topics covered under the Aldehydes, Ketones and Carboxylic Acids chapter are:

• 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 

The topics covered under the Amines chapter are:

• 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 

The topics covered under the Biomolecules chapter are:

• 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

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CBSE Class 12 Chemistry Practicals

CBSE Class 12 Chemistry practicals has a weightage of 30 marks in total and the test shall be conducted for a duration of 3 hours. 

CBSE Class 12 Chemistry Practical Syllabus

1. Surface Chemistry

1. Preparation of one lyophilic and one lyophobic sol

Lyophilic sol - starch, egg albumin and gum

2. Lyophobic sol - aluminium hydroxide, ferric hydroxide, arsenous sulphide.

Dialysis of sol-prepared in (a) above.

3. Study of the role of emulsifying agents in stabilizing the emulsion of different oils.

2. 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:

• Reaction of Iodide ion with Hydrogen Peroxide at room temperature using different concentrations of Iodide ions.
• Reaction between Potassium Iodate, (KIO₃) and Sodium Sulphite: (Na₂SO₃) using starch solution as an indicator (clock reaction).

3. 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.

4. Electrochemistry

Variation of cell potential in Zn/Zn²⁺|| Cu²⁺/Cu with change in concentration of

electrolytes (CuSO₄ or ZnSO₄) at room temperature.

5. 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).

6. Preparation of Inorganic Compounds

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

7. Preparation of Organic Compounds

Preparation of any one of the following compounds

1. Acetanilide
2. Di -benzalAcetone 
3. p-Nitroacetanilide 
4. Aniline yellow 
5. 2 - Naphthol Anilinedye.

8. Tests for the functional groups present in organic compounds:

Unsaturation, alcoholic, phenolic, aldehydic, ketonic, carboxylic and amino (Primary)

groups.

9. Characteristic tests of carbohydrates, fats and proteins in pure samples and their detection in given foodstuffs.
10. 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).

11. 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⁻ 

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CBSE Class 12 Chemistry Project Works

• 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 powder, chilli powder and pepper.

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Question Paper Design for CBSE Class 12 Chemistry

The question paper shall be designed based on the criteria as mentioned in the table below.