Chemical Reactions and Equations Notes | Previous Year Question

 

In chemistry, changes can be grouped into 2 parts i.e. PHYSICAL CHANGES & CHEMICAL CHANGES.

1. Cutting of iron rod - Physical Change
2. Rusting of iron rod - Chemical Change
3. Grapes get fermented - Chemical Change
4. Food is cooked         - Chemical Change
5. Food get digested in our body - Chemical Change

Physical Changes: Such types of changes which are temporary with no new substances are being formed are known as physical change. 

Chemical Changes: Such types of changes which are permanent with new substances are being formed is known as chemical changes. 

Topic 

We will learn following topics in the short notes of Chemical Equations and Equations are:

1. Chemical Reactions
2. Chemical Equations
3. Balanced Chemical Equations
4. Types of Chemical  Equations
5. corrosion & Rancidity
6. FAQ

CHEMICAL REACTIONS

• The process by which two or more substances react with each other to form new substances with different properties is known as chemical reaction. 
• Following changes can determine whether the chemical reactions has taken place or not. 
• ---- change in State
• ---- change in Colour
• ---- Evolution of Gas
• ---- Change in Temperature