Substance | Class 9 Chemistry | Sindhboard |Chapter 1 Fundamentals of Chemistry | what is substance

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Substance | Class 9 Chemistry | Sindhboard |Chapter 1 Fundamentals of Chemistry | what is substance lecture 8

What is Substance? | Definition & Types | Chemistry Made Easy

Substance in Chemistry | Pure vs Mixture Explained with Examples

Understanding Substance | Class 9 Chemistry | Urdu/Hindi Explanation

Chemistry Basics: Substance Explained for Beginners

In this video, we explain what a substance is in chemistry, its definition, types, and real-life examples. Learn the difference between pure substances and mixtures, and understand how substances are classified. This lesson is ideal for students of Class 9, Matric, and O-Level, or anyone new to chemistry.

🔍 Topics Covered:

What is a substance?

Pure substance vs mixture

Elements and compounds

Examples in daily life

What is a Substance?

✅ Definition:

A substance is a form of matter that has a definite composition and distinct properties.
It means it is made of the same kind of particles (atoms or molecules) throughout.

Types of Substances:

1. Pure Substance

Made of only one type of particle

Has fixed composition and constant properties

Cannot be separated into other substances by physical methods

🔸 Examples:

Elements: Hydrogen (H), Oxygen (O), Gold (Au), Iron (Fe)

Compounds: Water (H₂O), Salt (NaCl), Carbon dioxide (CO₂)

. Mixture (Not a pure substance)

Although sometimes people confuse it, a mixture is not a substance — because it contains more than one substance physically combined.
Example: Salt water, air, soil

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