CBSE Notes for Chemical Reactions and Equations Class 10 Extra Questions
1. Chemical reactions- The transformation of chemical substance into a new chemical substance by making and breaking of bonds between different atoms is known as Chemical Reaction.
2. Signs of a chemical reaction- These factors denote that a chemical reaction has taken place- change of state of a substance, change of color of substance, the evolution of heat, absorption of heat, the evolution of gas and evolution of light.
3. Chemical Equation: The representation of chemical reaction by means of symbols of substances in the form of formulae is called chemical equation. Please refer Chemical Reactions and Equations Class 10 Extra Questions for more information.
CBSE Revision Notes 