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Title: 9th Class Chemistry – Chapter 1: Fundamentals of Chemistry

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Description: Clear and concise notes for 9th grade chemistry – chapter 1. Includes definitions, branches of chemistry, and basic concepts. Ideal for students preparing for exams.

Institution
Punjab University Lahore Pakistan
Course
CHEM-9

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9th Class Chemistry
Chapter 1: Fundamentals of Chemistry



Definition of Chemistry:

Chemistry is the branch of science which deals with the composition, structure, properties, and changes of



Branches of Chemistry:

1. Organic Chemistry: Study of carbon compounds.

2. Inorganic Chemistry: Study of inorganic substances.

3. Physical Chemistry: Deals with physical properties of substances.

4. Analytical Chemistry: Concerned with composition of materials.

5. Biochemistry: Study of chemical processes in living organisms.



Importance of Chemistry in Daily Life:

- Medicines, detergents, cosmetics, plastics, fertilizers, and food preservatives are all based on chemical pr



Basic Terminologies:

- Atom: The smallest unit of an element.

- Molecule: A group of atoms bonded together.

- Element: A pure substance made of only one kind of atom.

- Compound: A substance formed by the chemical combination of two or more elements.

- Mixture: A combination of two or more substances not chemically combined.
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Punjab University Lahore Pakistan
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CHEM-9
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Uploaded on
April 11, 2025
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Written in
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  • 9th grade chemistry
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  • chemistry textbook
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  • 9th class chemistry chapter 1
  • chemistry notes for class 9
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