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Interconversion Of States Of Matter (Part - 1) - Chemistry, Class 11 Video Lecture

FAQs on Interconversion Of States Of Matter (Part - 1) - Chemistry, Class 11 Video Lecture

1. What are the three states of matter?

Ans. The three states of matter are solid, liquid, and gas. In a solid, the particles are closely packed together and have a fixed shape and volume. In a liquid, the particles are close together but can move past each other, giving it a definite volume but no fixed shape. In a gas, the particles are far apart and move freely, allowing it to fill the entire volume of its container.

2. How can a substance change its state from solid to liquid?

Ans. A substance can change its state from solid to liquid through a process called melting. This occurs when the substance is heated to its melting point, which is the temperature at which the solid changes into a liquid. During melting, the particles of the solid gain enough energy to overcome the forces holding them in a fixed arrangement, allowing them to move more freely and form a liquid.

3. What is the process of changing a liquid to a gas called?

Ans. The process of changing a liquid to a gas is called vaporization. There are two types of vaporization: evaporation and boiling. Evaporation occurs at the surface of a liquid when its particles gain enough energy to escape and become a gas. Boiling, on the other hand, occurs throughout the entire liquid when its temperature reaches the boiling point, causing rapid vaporization and the formation of bubbles.

4. Can a substance change directly from a solid to a gas?

Ans. Yes, a substance can change directly from a solid to a gas without passing through the liquid state. This process is called sublimation. Sublimation occurs when the solid is heated to its sublimation point, which is the temperature at which it changes into a gas without becoming a liquid first. Some common examples of substances that undergo sublimation are dry ice (solid carbon dioxide) and mothballs (naphthalene).

5. What is condensation and how does it occur?

Ans. Condensation is the process of changing a gas or vapor into a liquid. It occurs when the gas or vapor loses enough energy to slow down and come together to form liquid droplets. This usually happens when the gas or vapor is cooled down to its condensation point, which is the temperature at which it changes into a liquid. Condensation is responsible for the formation of clouds, dew, and fog.

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Sep 03, 2025 Last updated

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