CBSE Class 10 Science Exam 2025: The CBSE Class 10 Science Exam 2025 is scheduled for tomorrow, February 20, 2025, making it crucial for students to ensure that they don’t miss any important topic that may impact their marks in the exam. With time running out, focusing on the latest chapter-wise weightage and key topics becomes more important than ever. Understanding the unit-wise marks distribution can help students revise smartly and prioritize their preparation in these final hours. To support students in their last-minute revision, here is the detailed CBSE Class 10 Science Chapter-wise Weightage and Important Topics for the Board Exam 2025.
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CBSE Class 10 Science Chapter-Wise Weightage 2025
| Chapter Name | Marks |
| 1. Chemical Reactions and Equations | 6 |
| 2. Acids, Bases and Salts | 3 |
| 3. Metals and Non-Metals | 10 |
| 4. Carbon and its Compounds | 6 |
| 5. Life Processes | 9 |
| 6. Control and Coordination | 6 |
| 7. How do Organisms Reproduce? | 3 |
| 8. Heredity and Evolution | 7 |
| 9. Light - Reflection and Refraction | 10 |
| 10. The Human Eye and the Colourful World | 2 |
| 11. Electricity | 7 |
| 12. Magnetic Effects of Electric Current | 6 |
| 13. Our Environment | 5 |
| Total | 80 |
CBSE Class 10 Science Chapter-Wise Important Topics to Revise Before Exam
Understanding key concepts and practising essential questions from Chemistry, Biology, and Physics will help you secure better marks in your CBSE Class 10 Science Exam 2025. Here are the chapter-wise important topics you must revise before the exam:
CBSE Class 10 Chemistry Important Topics 2025
1.Chemical Reactions and Equations
- Types of Chemical Reactions
- Balancing Chemical Equations
- Decomposition Reactions
- Endothermic and Exothermic Reactions
- Oxidation and Reduction
2.Acids, Bases, and Salts
- Importance of pH in Everyday Life
- Difference Between Acid and Base
- Properties of Bases
- Difference Between Baking Soda and Baking Powder
3.Metals and Non-Metals
- Properties of Metals and Non-Metals
- Reactivity Series
- Metallurgy
- Corrosion and Its Prevention
4.Carbon and Its Compounds
- Nomenclature of Carbon Compounds
- Chemical Properties of Carbon Compounds
- Ethanol and Ethanoic Acid
- Homologous Series
CBSE Class 10 Biology Important Topics 2025
5.Life Processes
- Nutrition
- Respiration
- Transport and Excretion
6.Control and Coordination
- Nervous System
- Introduction to Plant Hormones
- Chemical Coordination: Animal Hormones
7.How do Organisms Reproduce?
- Asexual and Sexual Reproduction
- Reproduction in Animals
- Reproduction in Plants
8.Heredity
- Heredity
- Mendel's Contribution
- Laws for Inheritance of Traits
CBSE Class 10 Physics Important Topics 2025
9.Light - Reflection and Refraction
- Laws of Reflection and Refraction
- Refractive Index
- Lens Formula
- Mirror Formula
- Refraction of Light by Spherical Lenses
10.The Human Eye and the Colourful World
- Defects of Vision and Their Correction
- Applications of Spherical Mirrors and Lenses
11.Electricity
- Electric Current and Circuit
- Ohm's Law
- Resistance and Resistivity
- Series and Parallel Combination of Resistors
- Electric Power
12.Magnetic Effects of Electric Current
- Magnetic Field and Field Lines
- Electromagnetic Induction
- Fleming's Left-Hand Rule
- Alternating Current
- Advantages of AC Over DC
- Magnetic Field Due to Current Carrying Coil or Solenoid
13.Our Environment
- Ecosystem
- Biodegradable Substances
- Non-Biodegradable Substances
- Ozone Depletion
A clear understanding of the CBSE Class 10 Science Chapter-wise Weightage and Important Topics will enable students to plan their last-minute preparation effectively. Concentrate on high-scoring units, revise key formulas and diagrams, and practise important numerical and theoretical questions to excel in the CBSE Class 10 Science Board Exam 2025.
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