CBSE Class 11 Science

CBSE Class 11 Science Chapter Weightage 2026-27

Subject-wise Marks Distribution & Chapter-wise Weightage

Understand the exact marks distribution across chapters to plan your board and competitive exam preparation effectively. Focus on high-weightage topics for better scores.

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CBSE Class 11 Physics Chapter Weightage 2026-27

Unit	Unit Name	Weightage (%)	Marks (70)	Priority
Unit 1	Physical World and Measurement	5%	4	Low
Unit 2	Kinematics	15%	11	Critical
Unit 3	Laws of Motion	15%	11	Critical
Unit 4	Work, Energy and Power	10%	7	High
Unit 5	Motion of System of Particles	10%	7	Medium
Unit 6	Gravitation	8%	6	High
Unit 7	Properties of Bulk Matter	10%	7	Medium
Unit 8	Thermodynamics	12%	8	Critical
Unit 9	Kinetic Theory of Gases	5%	4	Low
Unit 10	Oscillations and Waves	10%	7	High
Total		100%	70	—

Critical Units

Kinematics, Laws of Motion, Thermodynamics

High Priority

Work Energy Power, Gravitation, Waves

Low Priority

Measurement, Kinetic Theory

Strategy: Focus on Mechanics (Units 2-6) as they together account for 58% of the marks. Thermodynamics (Unit 8) is also crucial for both board and competitive exams.

CBSE Class 11 Chemistry Chapter Weightage 2026-27

Section	Unit Name	Weightage (%)	Marks (70)	Priority
Physical Chemistry
Unit 1	Some Basic Concepts of Chemistry	8%	6	Critical
Unit 2	Structure of Atom	7%	5	High
Unit 3	Classification of Elements	4%	3	Medium
Unit 4	Chemical Bonding	10%	7	Critical
Unit 5	States of Matter	5%	4	Medium
Unit 6	Thermodynamics	8%	6	Critical
Unit 7	Equilibrium	7%	5	High
Unit 8	Redox Reactions	3%	2	Low
Inorganic Chemistry
Unit 9	Hydrogen	3%	2	Low
Unit 10	s-block Elements	5%	4	Medium
Unit 11	Some p-block Elements	7%	5	Medium
Organic Chemistry
Unit 12	Organic Chemistry Basics	10%	7	Critical
Unit 13	Hydrocarbons	12%	8	Critical
Unit 14	Environmental Chemistry	3%	2	Low
Total		100%	70	—

Physical Chemistry

35% (24 marks)

Inorganic Chemistry

30% (21 marks)

Organic Chemistry

35% (25 marks)

Strategy: Physical Chemistry and Organic Chemistry together carry 70% of the marks. Focus on Mole Concept, Chemical Bonding, Thermodynamics, Organic Chemistry Basics, and Hydrocarbons.

CBSE Class 11 Biology Chapter Weightage 2026-27

Unit	Unit Name	Weightage (%)	Marks (70)	Priority
Unit 1	Diversity in Living World	15%	11	High
Unit 2	Structural Organisation in Plants and Animals	15%	11	Medium
Unit 3	Cell Structure and Function	20%	14	Critical
Unit 4	Plant Physiology	25%	17	Critical
Unit 5	Human Physiology	25%	17	Critical
Total		100%	70	—

Plant Physiology

25% (17 marks)

Human Physiology

25% (17 marks)

Cell Structure

20% (14 marks)

Strategy: Plant Physiology and Human Physiology together carry 50% of the marks. Cell Structure and Function carries 20%. Focus on NCERT content and diagrams for these units.

CBSE Class 11 Mathematics Chapter Weightage 2026-27

Unit	Unit Name	Weightage (%)	Marks (80)	Priority
Unit 1	Sets and Functions	15%	12	High
Unit 2	Algebra	25%	20	Critical
Unit 3	Coordinate Geometry	25%	20	Critical
Unit 4	Calculus	20%	16	Critical
Unit 5	Mathematical Reasoning	5%	4	Low
Unit 6	Statistics and Probability	10%	8	Medium
Total		100%	80	—

Algebra

25% (20 marks)

Coordinate Geometry

25% (20 marks)

Calculus

20% (16 marks)

Strategy: Algebra, Coordinate Geometry, and Calculus together carry 70% of the marks. Focus on these units for JEE preparation. Sets, Statistics, and Reasoning should be studied but are less critical.

CBSE Class 11 Science Overall Weightage Summary 2026-27

Subject	Total Marks	Theory Marks	Practical / Internal	Exam Duration
Physics	100	70	30	3 hours
Chemistry	100	70	30	3 hours
Biology	100	70	30	3 hours
Mathematics	100	80	20	3 hours

Subjects with Highest Weightage

• Physics: Mechanics (40%)
• Chemistry: Physical Chemistry (35%), Organic Chemistry (35%)
• Biology: Plant Physiology (25%), Human Physiology (25%)
• Mathematics: Algebra (25%), Coordinate Geometry (25%)

Preparation Strategy

• Prioritize high-weightage chapters first
• Allocate more time to critical chapters
• Practice previous year papers for time management
• Focus on conceptual clarity over rote learning
• Take mock tests to identify weak areas
• Balance board and competitive exam preparation

Final Strategy: Focus on chapters with 15%+ weightage first. Master them completely before moving to medium-weightage chapters. This ensures you secure maximum marks with your study time for the 2026-27 exams.

Frequently Asked Questions

What is the chapter weightage for CBSE Class 11 Physics in 2026-27?

In CBSE Class 11 Physics, Mechanics carries 40%, Thermodynamics carries 12%, Waves and Oscillations carry 10%, and other units carry the remaining 38% of the total marks.

How are marks distributed in CBSE Class 11 Chemistry in 2026-27?

In CBSE Class 11 Chemistry, Physical Chemistry carries 35%, Inorganic Chemistry carries 30%, and Organic Chemistry carries 35% of the total marks.

Which subject has the highest practical marks in Class 11 Science?

All science subjects - Physics, Chemistry, and Biology - have 30 marks for practical assessment. Mathematics has 20 marks for internal assessment.

How should I prioritize chapters based on weightage for 2026-27?

Start with chapters that have 15% or higher weightage. Master them thoroughly, then move to medium-weightage chapters (10-15%). Chapters with lower weightage should be studied last but not ignored.

How can StudyDecode help me understand chapter weightage for Class 11 Science?

StudyDecode provides comprehensive guidance on CBSE Class 11 Science chapter weightage. We help you identify high-priority chapters, plan your study schedule, and prepare effectively for board and competitive exams. Book a free consultation to know more.