Book Store

Download books and chapters from book store.
Currently only available for.
CBSE

Previous Year Papers

Download the PDF Question Papers Free for off line practice and view the Solutions online.
Currently only available for.
Class 10 Class 12

Chemical Reactions and Equations

Quickly browse through questions and notes on related topics. You can also download and read this topic offline.

Introduction

Any change can be classified as physical change and chemical change. Physical changes can be easily reversed but, it is not easy to reverse a chemical change.

The process in which new substances with new properties are formed from one or more substances is called Chemical Reaction.
Chemical changes are more permanent than physical changes.
Chemical reactions are the processes in which new substances with new properties are formed.
Reactants and Products:
1. The substances which take part in a chemical reaction are called Reactants.
2. The substances which are formed in a chemical reaction are called Products.
Examples :
1. Digestion of food
2. Respiration
3. Rusting of iron
4. Burning of Magnesium ribbon
5. Formation of curd
A chemical reaction involves :
1. Change in state
2. Change in colour
3. Change in temperature
4. Evolution of gas