CBSE Class 12 Science

CBSE Class 12 Science Guide 2026-27

PCM & PCB — Complete Board Exam Resource

Master your CBSE Class 12 Science subjects and crack competitive exams like JEE and NEET. Your complete CBSE Class 12 Science roadmap for board and competitive success.

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4 Core Subjects 6 Sections Updated for 2026-27 JEE & NEET Prep

CBSE Class 12 Science Syllabus 2026-27

Physics

• Electrostatics
• Current Electricity
• Magnetic Effects
• Electromagnetic Induction
• Alternating Current
• Electromagnetic Waves
• Optics
• Dual Nature of Radiation
• Atoms and Nuclei
• Semiconductor Electronics

Chemistry

• Solutions
• Electrochemistry
• Chemical Kinetics
• d & f Block Elements
• Coordination Compounds
• Haloalkanes & Haloarenes
• Alcohols, Phenols & Ethers
• Aldehydes, Ketones & Acids
• Amines
• Biomolecules

Biology (PCB)

• Reproduction
• Genetics and Evolution
• Biology and Human Welfare
• Biotechnology
• Ecology and Environment

Mathematics (PCM)

• Relations and Functions
• Algebra
• Calculus
• Vectors and 3D Geometry
• Linear Programming
• Probability

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CBSE Class 12 Science Exam Pattern 2026-27

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

View Detailed Exam Pattern

CBSE Class 12 Science Important Dates 2026-27

Event	Date (Tentative)
Academic Year Start	April 2026
First Periodic Test	May 2026
Pre-Board Exam I	December 2026
Pre-Board Exam II	January 2027
Board Exam	February-March 2027
Result Declaration	May-June 2027

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CBSE Class 12 Science Preparation Tips

Subject-wise Strategy

• Physics: Focus on numericals and derivations
• Chemistry: Master reactions and mechanisms
• Biology: Learn diagrams and processes
• Mathematics: Practice daily, master formulas

Board & Competitive Prep

• Solve previous years' board papers
• Take JEE/NEET mock tests regularly
• Focus on high-weightage chapters
• Revise thoroughly before exams

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CBSE Class 12 Science Important Chapters

Physics

• Electrostatics
• Current Electricity
• Magnetic Effects
• Electromagnetic Induction
• Optics
• Semiconductor Electronics

Chemistry

• Solutions
• Electrochemistry
• Chemical Kinetics
• Coordination Compounds
• Haloalkanes & Haloarenes
• Aldehydes, Ketones & Acids

View All Important Chapters

CBSE Class 12 Science Chapter Weightage

Subject	Unit	Weightage (%)
Physics	Electrostatics & Current Electricity	20%
	Magnetic Effects & EMI	20%
	Optics & Modern Physics	30%
Chemistry	Physical Chemistry	35%
	Inorganic Chemistry	30%
	Organic Chemistry	35%

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Frequently Asked Questions

What is the difference between PCM and PCB in Class 12?

PCM stands for Physics, Chemistry, and Mathematics. It is for students aiming for engineering careers (JEE). PCB stands for Physics, Chemistry, and Biology. It is for students aiming for medical careers (NEET).

How can StudyDecode help me with CBSE Class 12 Science?

StudyDecode provides comprehensive guidance for CBSE Class 12 Science students. From subject selection to exam preparation, career counseling, and JEE/NEET guidance — we help you succeed. Book a free consultation to know more.