The 2023 registration for CBSE Class 12
The 2023 registration for CBSE Class 12 was conducted in the month of October. The school will initiate the registration process for the students in Class 12. Generally, the schools will need to submit a List of Candidates (LoC) for all the students that will be appearing for the board exams and their details. CBSE launched the online platform for data correction, known as, Pariksha Sangram on the request of affiliated schools that they need to make List of Candidates (LOC).
Changes in the board exam pattern
CBSE has introduced some changes in the board exam pattern from Class 9 to 12. In light of the new National Education Policy (NEP), the board has begun to move toward Competency-Based Education. The overall marks and duration of the examination will remain the same. There are two stages of the exam. One is theoretical, and the other is practical. Theory subjects are held for 80 to 70 marks for language and academic subjects. Practical exams are conducted for Mathematics, Physics, Chemistry, Biology, and Computer Science.
- Mode of Examination: Offline
- Duration of Exam: 3 hours
- Medium of Question: English for Academic Subjects. Furthermore, it depends on the Language subject.
- Types of Questions: Multiple-choice questions and subjective-type questions
- Maximum Marks for Theory: 80 or 70 Marks
- Maximum Marks for the Practical exam: 20 or 30 Marks
CBSE Class 12 board exam pattern is divided into three main streams: Science, Commerce, and Arts. We have provided below the CBSE Class 12 exam pattern for your reference:
- Some subjects in CBSE Class 12 are common for all stream students.
- The total duration is 3 hours.
- The question paper usually consists of the following type of questions:
- Very Short Answer Questions (1 mark each),
- Short Answer Type Questions-I (2 marks each),
- Short Answer Type Questions-II (3 marks each),
- Value-based Questions (4 marks),
- Long Answer Type Questions (5 marks each).
CBSE Class 12 Chemistry 2023 exam pattern is provided below in detail
CBSE Class 12 Chemistry Syllabus 2022-2023 has been released by the Central Board of Secondary Education (CBSE). The board has dropped a few chapters/topics from the syllabus and has advised students to prepare only as per the content mentioned in the latest syllabus.
CBSE Class 12 Chemistry Marks 2023
Check CBSE Class 12 Chemistry Syllabus 2022-23 below:
| S. No. | Title | Marks |
| 1 | Solutions | 7 |
| 2 | Electrochemistry | 9 |
| 3 | Chemical Kinetics | 7 |
| 4 | d -and f -Block Elements | 7 |
| 5 | Coordination Compounds | 7 |
| 6 | Haloalkanes and Haloarenes | 6 |
| 7 | Alcohols, Phenols and Ethers | 6 |
| 8 | Aldehydes, Ketones and Carboxylic Acids | 8 |
| 9 | Amines | 6 |
| 10 | Biomolecules | 7 |
| Total | 70 |
CBSE Class 12 Chemistry Syllabus 2023 PDF Download (Updated)
Unit 2: 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 3: 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 4: 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 8: 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 9: 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 10: 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 11: 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 12: 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 13: 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 14: 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.
