10th Boards science notes

Class 10 Science Notes
Chapter 1: Chemical Reactions and Equations




2025-10-03

, Class 10 Science Chapter 1 Notes


Contents

1 Chemical Reactions and Equations 2

1.1 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2

1.2 Chemical Equations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2

1.3 Types of Chemical Reactions . . . . . . . . . . . . . . . . . . . . . . . . 3

1.4 Exothermic and Endothermic Reactions . . . . . . . . . . . . . . . . . 4

1.5 Physical and Chemical Changes . . . . . . . . . . . . . . . . . . . . . . . 5

1.6 Effects of Oxidation in Everyday Life . . . . . . . . . . . . . . . . . . . 5

1.7 Endothermic and Exothermic Reaction Energy Diagrams . . . . . . . 6

1.8 Activity: Reaction of Baking Soda and Vinegar . . . . . . . . . . . . . 6

1.9 Summary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7


2 Detailed Notes and Concepts 8

2.1 Law of Conservation of Mass . . . . . . . . . . . . . . . . . . . . . . . . 8

2.2 Writing and Balancing Chemical Equations . . . . . . . . . . . . . . . 8

2.3 Importance of Chemical Equations . . . . . . . . . . . . . . . . . . . . 9

2.4 Examples of Important Reactions . . . . . . . . . . . . . . . . . . . . . 9

2.5 Indicators of Chemical Reactions . . . . . . . . . . . . . . . . . . . . . . 9

2.6 Activity: Reaction of Iron with Copper Sulphate Solution . . . . . . . 10

2.7 Conclusion . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10




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