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Class 9 Science Chapter 3 Notes in Hindi

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Class 9 Science Chapter 3 Notes in Hindi

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Questions and Answers

What is the main topic of Class 9 Science Chapter 3?

Forces and Laws of Motion

Sound

Atoms and Molecules (correct)

Gravitation

What is the role of protons in an atom?

Positive charge but no mass

Positive charge and mass (correct)

Negative charge and mass

No charge but mass

What is the significance of Avogadro's law?

Equal volumes of gases contain equal numbers of molecules under similar conditions of temperature and pressure (correct)

Equal volumes of liquids contain equal numbers of molecules under similar conditions of temperature and pressure

Equal volumes of different gases contain equal numbers of molecules under similar conditions of temperature and pressure

Equal volumes of solids contain equal numbers of molecules under similar conditions of temperature and pressure

Study Notes

Atomic Structure

The main topic of Class 9 Science Chapter 3 is Atomic Structure.

Atomic Particles

Protons are positively charged particles that reside in the nucleus of an atom, contributing to its overall positive charge.
The number of protons in an atom determines the element of an atom, and each element has a unique number of protons in its atoms.

Gas Laws

Avogadro's law states that equal volumes of gases at the same temperature and pressure have an equal number of molecules.
The significance of Avogadro's law lies in its ability to calculate the quantity of gas molecules and understand the behavior of ideal gases.

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Description

Access class 9 science chapter 3 notes in Hindi for comprehensive study and preparation. The notes cover important topics and concepts to help students excel in their science studies.