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FAQs on States of Matter in One Shot
| 1. What are the main states of matter? |  |
Ans. The main states of matter are solid, liquid, gas, and plasma. Solids have a definite shape and volume, liquids have a definite volume but take the shape of their container, gases have neither definite shape nor volume, and plasmas are ionised gases with free electrons and ions, typically found at high temperatures.
| 2. How do the properties of solids differ from those of liquids? | |
Ans. Solids have closely packed particles that are held together by strong intermolecular forces, giving them a fixed shape and volume. In contrast, liquids have particles that are less tightly packed, allowing them to flow and take the shape of their container while maintaining a definite volume.
| 3. What is the significance of temperature and pressure in determining the state of matter? | |
Ans. Temperature and pressure are crucial factors that influence the state of matter. Increasing temperature typically provides energy that can change a solid to a liquid (melting) or a liquid to a gas (vapourisation). Conversely, increasing pressure can compress gases into liquids and solids, altering their states accordingly.
| 4. What is an example of a phase transition? | |
Ans. An example of a phase transition is the process of boiling, where a liquid turns into a gas when it reaches its boiling point. This transition occurs as the temperature increases, allowing the particles to gain enough energy to break free from the liquid's intermolecular forces.
| 5. How does the kinetic molecular theory explain the behaviour of gases? | |
Ans. The kinetic molecular theory explains that gases consist of a large number of small particles that are in constant random motion. The theory states that the average kinetic energy of these particles is directly proportional to the temperature of the gas. This motion leads to the gas expanding to fill its container and having low density compared to solids and liquids.
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Apr 10, 2026 Last updated
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