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Gases and Its Properties Video Lecture | Science Olympiad Class 4

FAQs on Gases and Its Properties Video Lecture - Science Olympiad Class 4

1. What are the different properties of gases?

Ans. Gases have several properties, including compressibility, expansion, low density, diffusion, and high thermal conductivity. They can be compressed into smaller volumes, expand to fill the entire space available to them, have low density compared to solids and liquids, mix and spread easily through diffusion, and conduct heat well.

2. How are gases different from solids and liquids in terms of their properties?

Ans. Gases differ from solids and liquids in terms of their properties. Unlike solids, gases do not have a fixed shape or volume and can expand to fill the container they are in. They also have lower density compared to both solids and liquids. Unlike liquids, gases have the ability to be compressed into smaller volumes.

3. What is meant by the term "compressibility" in relation to gases?

Ans. Compressibility refers to the ability of gases to be compressed into smaller volumes under increased pressure. Gases have larger intermolecular spaces compared to solids and liquids, allowing the gas particles to move closer together when pressure is applied. This property is important in various industrial and scientific applications.

4. How does diffusion occur in gases?

Ans. Diffusion is the process by which gases mix and spread out to occupy the available space. It occurs because gas particles are in constant random motion. These particles move from an area of high concentration to an area of low concentration until a uniform concentration is achieved. This property of gases makes them essential in processes like ventilation and air circulation.

5. Why do gases have high thermal conductivity?

Ans. Gases have high thermal conductivity because of the rapid movement and collision of gas molecules. When heat is applied to a gas, the molecules gain kinetic energy and move faster. This increased movement allows for efficient transfer of heat energy through collisions between gas molecules. This property is utilized in various heating and cooling systems.

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Oct 01, 2025 Last updated

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