CBSE Class 12 Chemistry Syllabus 2025-26: Marks, Units & Exam Prep

The Central Board of Secondary Education has released the updated CBSE Class 12 Chemistry Syllabus for the 2025-26 academic session, detailing the units, exam marks distribution, practical evaluation schemes, and preparation strategies. Students can access the comprehensive curriculum officially available on the portal www.cbseacademic.nic.in or download the official CBSE Class 12 Chemistry Syllabus 2025-26 PDF to plan their academic year effectively.

For a broader view of the curriculum across different subjects, you can check out the CBSE Class 12 Syllabus 2025-26 overview.

Overview of Exam Structure

The chemistry examination consists of a theory paper worth 70 marks and a practical assessment worth 30 marks, totaling a 100-mark evaluation. The curriculum is structured into 10 essential units.

CBSE Class 12 Chemistry Syllabus 2025-26 Unit-Wise Marks Distribution

To maximize your performance, understanding the unit-wise weightage is crucial. The theory curriculum is divided into physical, organic, and inorganic chemistry segments.

Units	Name of Units	Marks
Unit 1	Solutions	7
Unit 2	Electrochemistry	9
Unit 3	Chemical Kinetics	7
Unit 4	d -and f -Block Elements	7
Unit 5	Coordination Compounds	7
Unit 6	Haloalkanes and Haloarenes	6
Unit 7	Alcohols, Phenols and Ethers	6
Unit 8	Aldehydes, Ketones and Carboxylic Acids	8
Unit 9	Amines	6
Unit 10	Biomolecules	7
Total Marks		70

Practical Evaluation Scheme

The 30-mark practical assessment is divided into several components to evaluate experimental skills and project understanding.

Evaluation Scheme for Examination	Marks
Volumetric Analysis	08
Salt Analysis	08
Content Based Experiment	06
Project Work	04
Class record and viva	04
Total Marks	30

CBSE Class 12 Chemistry Syllabus 2025-26 for Practical

S.No.	Practicals
A.	Surface Chemistry (a) Preparation of one lyophilic and one lyophobic sol: Lyophilic sol (starch, egg albumin, gum) and Lyophobic sol (aluminum hydroxide, ferric hydroxide, arsenous sulphide). (b) Dialysis of the prepared sols as described in the previous experiment. (c) Investigation into the role of emulsifying agents in stabilizing various oil-based emulsions.
B.	Chemical Kinetics (a) Study of the influence of concentration and temperature on the reaction rate between Sodium Thiosulphate and Hydrochloric acid. (b) Kinetic study of one of the following reactions: (i) Reaction of Iodide ions with Hydrogen Peroxide at room temperature using varying concentrations of Iodide. (ii) Clock reaction between Potassium Iodate (KIO3) and Sodium Sulphite (Na2SO3) utilizing a starch solution as an indicator.
C.	Thermochemistry Choose any one of the following thermochemical experiments: (a) Enthalpy of dissolution for Copper Sulphate or Potassium Nitrate. (b) Enthalpy of neutralization for a strong acid (HCl) and a strong base (NaOH). (c) Determination of enthalpy change during 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 plant pigments via paper chromatography and calculation of Rf values. (b) Separation of constituents in an inorganic mixture containing two cations with distinct Rf values.
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 one of the following organic compounds: i) Acetanilide ii) Dibenzalacetone iii) p-Nitroacetanilide iv) Aniline Yellow or 2-Naphthol Aniline dye.
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 titration standardization. (b) Ferrous Ammonium Sulphate titration standardization. (Students are required to independently prepare standard solutions by weighing reagents.)
K.	Qualitative analysis Systematic qualitative analysis to determine one anion and one cation in a given salt sample: Cations: 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-

Suggested Investigatory Projects

Scientific investigations involving laboratory testing and collecting information from other sources form a core part of project work. Here are the suggested project topics:

• Analysis of oxalate ion content in guava at different ripening stages.
• Quantification of casein levels in various milk samples.
• Preparation of soybean milk and comparative study with dairy milk regarding curd formation and thermal stability.
• Assessment of Potassium Bisulphate as a food preservative under varying temperature and concentration conditions.
• Study of starch digestion via salivary amylase, focusing on the impact of pH and temperature.
• Comparative investigation of fermentation rates in materials like wheat flour, potato juice, and carrot juice.
• Extraction of essential oils from botanical sources like Saunf, Ajwain, and Illaichi.
• Identification of common food adulterants in oils, butter, sugar, and spices like turmeric or chilli powder.

How to complete the CBSE Class 12 Chemistry Syllabus 2025-26

1. Thoroughly review the official CBSE Class 12th syllabus to gain a complete understanding of all required topics.
2. Create a monthly study plan, allocating specific timeframes to each unit to ensure balanced coverage.
3. Designate regular revision days (e.g., the 2nd, 5th, and 9th of each month) to reinforce learned concepts.
4. Once a unit is completed, practice with previous years' papers and mock tests to assess your preparedness.

Note that CBSE does not have a formal grace marks policy for students, meaning thorough preparation and systematic practice are essential for securing high grades.

Related Links

CBSE Class 12 Syllabus 2025-26	CBSE Class 12 Physics Syllabus 2025-26
CBSE Class 12 English Syllabus 2025-26	CBSE Class 12 Maths Syllabus 2025-26

Frequently Asked Questions (FAQs)

Q1. How many units are there in the new CBSE Class 12 Chemistry Syllabus 2025-26?

Ans. The latest CBSE Class 12 Chemistry syllabus consists of 10 comprehensive units.

Q2. Is NCERT enough to complete the CBSE Class 12 Chemistry syllabus 2025-26?

Ans. Yes, studying from NCERT textbooks is highly recommended and sufficient to cover the core requirements of the CBSE Class 12 Chemistry syllabus.

Q3. Does CBSE give grace marks in Chemistry paper?

Ans. No, the CBSE does not have a formal grace marks policy for students.

Q4. Where can I find the official CBSE Class 12 Chemistry Syllabus 2025-26?

Ans. The syllabus is officially available on the Central Board of Secondary Education portal at www.cbseacademic.nic.in.