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Characteristics of Solids, Liquids & Gases Video Lecture - Class 9

FAQs on Characteristics of Solids, Liquids & Gases Video Lecture - Class 9

1. What are the characteristics of solids, liquids, and gases?

Ans. Solids have a definite shape and volume, with tightly packed particles that vibrate in fixed positions. Liquids have a definite volume but take the shape of their container, with particles that are close together but can move and flow past each other. Gases have neither a definite shape nor volume, with particles that are far apart and move freely in all directions.

2. How do the particles in solids, liquids, and gases behave differently?

Ans. In solids, the particles are tightly packed and vibrate in fixed positions. In liquids, the particles are close together and can move and flow past each other. In gases, the particles are far apart and move freely in all directions.

3. What is the relationship between temperature and the state of matter?

Ans. Temperature plays a crucial role in determining the state of matter. Increasing the temperature can cause a substance to change from a solid to a liquid (melting) and from a liquid to a gas (evaporation). Decreasing the temperature can cause a gas to condense into a liquid (condensation) and a liquid to freeze into a solid (freezing).

4. How do the intermolecular forces differ in solids, liquids, and gases?

Ans. In solids, the intermolecular forces are strong, holding the particles tightly together. In liquids, the intermolecular forces are weaker, allowing the particles to move past each other. In gases, the intermolecular forces are very weak, and the particles move freely.

5. What are examples of substances in each state of matter?

Ans. Examples of solids include wood, plastic, and metal. Examples of liquids include water, oil, and milk. Examples of gases include oxygen, nitrogen, and carbon dioxide.

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Jan 06, 2025 Last updated

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