ISC Class 12 Chemistry Weightage 2026 Unit and Chapter-Wise Marks Distribution

ISC Class 12 Chemistry Weightage 2026 : If you are the one who is preparing for the ISC Exam you should know that the ISC Class 12 Chemistry exam is divided into two parts: a 70-mark theory paper and a 30-mark practical assessment. The theory paper is 3 hours long and divided into four sections (A, B, C, and D) with different mark distributions for questions, including internal choices. The practical assessment includes the practical exam (15 marks), project work (10 marks), and a practical file (5 marks). You can analyse unit and chapter-wise weightage to better plan your studies and allocate a greater mark. You can go through the article below to know more about ISC Class 12 Chemistry Unit-wise Marks Distribution 2026 below.

Also Check ISC Class 12 Chemistry Syllabus 2025-26

ISC Class 12 Chemistry Unit-wise Marks Distribution 2026

The ISC Class 12 Chemistry exam 2026 is divided into three parts: Physical, Inorganic, and Organic Chemistry, following the theory paper of 80 marks. You can check the estimated weightage of marks below.

Unit	Approximate Marks
Unit 1: Some Basic Concepts of Chemistry	4
Unit 2: Structure of Atom	4
Unit 3: Classification of Elements and Periodicity in Properties	4
Unit 4: Chemical Bonding and Molecular Structure	6
Unit 5: States of Matter	4
Unit 6: Thermodynamics	4
Unit 7: Equilibrium	4
Unit 8: Redox Reactions	5
Unit 9: Hydrogen and its Compounds	5
Unit 10: s-Block Elements	4
Unit 11: Some p-Block Elements	4
Unit 12: Organic Chemistry	6
Unit 13: Environmental Chemistry	3
Unit 14: Chemical Industries	5

ISC Class 12 Chemistry 2026 Practical Paper Evaluation Criteria

The detailed criteria for the ISC Class 12 Chemistry practical exam 2026 are listed here for your reference:

Particulars	Details
Experiments	Titrations Rate of reaction Identification of compounds and functional groups based on observations Tests of Carbohydrates and Proteins PH change using ph paper or universal indicator Electrochemistry Qualitative analysis
Total Marks	15 marks
Question pattern	Question 1: Volumetric analysis Question 2: Combination of the experiments Question 3: Qualitative analysis

ISC Class 12 Chemistry 2026 Project Work Evaluation Criteria

Check the ISC Class 12 chemistry evaluation criteria in the table below:

Assessment	Criteria	Marks
Project Work	Introduction Contents Analysis/material aid Presentation Bibliography	10 marks
Practical File	The examiner will evaluate your performance based on the practical file maintained by you.	5 marks
Total		15 marks

You can also download the ISC Class 12 Chemistry Sample Papers 2025-26 here to prepare for the final exam.