ICSE Class 10 2026

ICSE Class 10 Important Chapters 2026

Subject-wise Key Chapters & High-Weightage Topics

Focus on the most important chapters for ICSE Class 10 board exams. Master these key topics to maximize your scores. Your complete guide to ICSE Class 10 important chapters.

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Mathematics Important Chapters

Chapter	Importance	Key Topics	Marks
Quadratic Equations	High	Solving equations, nature of roots, word problems	10-12
GST, Banking, Shares & Dividends	High	Commercial Mathematics applications	13
Algebra (Linear Inequations, Matrices, AP & GP)	High	Linear inequations, matrices, arithmetic/geometric progression	20
Mensuration	High	Area and volume of solids (cylinder, cone, sphere)	8
Trigonometry	High	Identities, heights and distances	8
Statistics	Medium	Mean, median, mode, graphical representation	8

Physics Important Chapters

Mechanics

• Motion and Laws of Motion - High
• Work, Energy, and Power - High
• Machines - Medium

Light & Sound

• Reflection and Refraction of Light - High
• Lens and Prism - High
• Sound Waves - Medium

Electricity & Magnetism

• Electric Circuits and Current - High
• Magnetic Effects of Current - Medium
• Household Circuits - Medium

Modern Physics

• Radioactivity - Medium
• Nuclear Energy - Medium

Chemistry Important Chapters

Study of Compounds

• HCl, NH3, HNO3, H2SO4 - High (15-20 marks)
• Chemical properties and reactions
• Industrial preparation and uses

Organic Chemistry

• Hydrocarbons - High (12-15 marks)
• Alcohols, Aldehydes, Carboxylic Acids
• Functional groups and reactions

Mole Concept

• Stoichiometry - High (10-12 marks)
• Empirical formula
• Molar volume calculations

Electrolysis

• Electrolytes - Medium (8-10 marks)
• Selective discharge of ions
• Applications of electrolysis

Biology Important Chapters

Human Body Systems

• Digestive System - High
• Respiratory System - High
• Circulatory System - High
• Excretory System - Medium

Plant Physiology

• Photosynthesis - High
• Transport in Plants - High
• Respiration in Plants - Medium

Genetics

• Cell Division - High
• Heredity and Variation - Medium
• Evolution - Medium

Ecology

• Ecosystems - Medium
• Food Chains - Medium
• Environmental Conservation - Medium

English Literature Important Chapters

Drama: Julius Caesar

• Act III: The assassination, Mark Antony's speech
• Act IV: The fall of the conspirators
• Act V: The battle of Philippi, Brutus' death
• Key characters: Brutus, Caesar, Antony, Cassius
• Key themes: Ambition, betrayal, loyalty, fate

Treasure Chest (Prose & Poetry)

• Key Stories:
• The Elevator, The Girl Who Can, The Pedestrian
• With the Photographer, The Last Lesson
• Key Poems:
• Haunted Houses, The Glove and the Lions
• When Great Trees Fall, A Considerable Speck
• The Power of Music

History & Civics Important Chapters

History

• First War of Independence (1857)
• Early Nationalists (1885-1905)
• Assertive Nationalists (1905-1914)
• Mass Phase (1915-1947) - High
• World Wars and Rise of Dictatorships
• United Nations and NAM

Civics

• The Union Legislature - High
• The Union Executive - High
• The Judiciary - High
• Lok Adalats

Geography Important Chapters

Physical Geography

• Climate of India - High
• Map Work (Topographical Maps) - High
• Rivers and Water Bodies
• Soil and Vegetation

Human Geography

• Resources and Conservation - High
• Agriculture - Medium
• Industries - Medium
• Population - Medium
• Map Work (India Map) - High

Frequently Asked Questions

Which chapters are most important for ICSE Class 10 board exams?

Focus on chapters with High importance as marked in the tables above. These chapters carry more weightage in exams.

Should I ignore chapters marked as Medium importance?

No, all chapters are important. Focus more time on High importance chapters, but ensure you cover Medium importance chapters as well.

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