Class 10 Science begins with the most essential chapter—Chemical Reactions and Equations. This chapter forms the base for many concepts you’ll see later in chemistry, not only in Class 10 but also in Classes 11 and 12. It explains the types of chemical changes that occur around us, how to write chemical equations, how to balance them, and the types of reactions like combination, decomposition, displacement, and redox. This PDF of Chapter 1 from the NCERT Science book helps you revise these concepts in a clear and structured way, just like it’s taught in school.
I’m sharing this chapter because it’s where most students start struggling with chemistry. If your basics are not strong here, then chapters like acids, bases, and metals become even harder later. This PDF will help you revise the content at your own pace. Whether you’re preparing for your school exam, a unit test, or pre-boards, having the official NCERT Chapter 1 PDF makes revision easier. The language used is student-friendly, and the diagrams and examples help a lot in understanding what’s happening during reactions. I’ve seen many students improve their marks just by understanding this chapter properly.
Key Topics Covered in Chapter 1: Chemical Reactions and Equations
Here’s a quick look at the main concepts you’ll learn from this chapter:
- What is a chemical reaction?
- Writing and balancing chemical equations
- Types of chemical reactions:
- Combination Reaction
- Decomposition Reaction
- Displacement Reaction
- Double Displacement Reaction
- Oxidation and Reduction (Redox Reaction)
- Effects of oxidation in everyday life
- Precipitation reactions
- Burning and rusting as real-life examples of chemical changes
Each topic is explained with proper examples, and there are exercises and in-text questions to help you test your understanding.
Benefits of Using the NCERT PDF for Chapter 1
- Official content from NCERT, exactly like your school textbook
- Based on the CBSE curriculum and follows the board exam pattern
- Clear language with visuals and reaction diagrams
- Free to download and accessible from any device
- Helpful for self-study and exam preparation
- Supports conceptual learning rather than rote memorisation
You can also use this PDF alongside your coaching or tuition notes for better clarity.

















