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प्रश्न
Name the three states of matter and define them.
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उत्तर
The three states of matter are solid, liquid and gaseous.
- Solid State: A solid has a definite shape and a definite volume. Molecules in the solid state are packed very close to each other. Intermolecular space is almost negligible, while the intermolecular force of attraction between the molecules is very strong in solids.
- Liquid State: A liquid has a definite volume but no definite shape. The molecules in the liquid are less closely packed than in solids. The intermolecular space is greater than solids. The molecules have a weaker intermolecular force of attraction; therefore, the liquid molecules have greater movement than solids, and hence, a liquid flows.
- Gaseous state: A gas has neither a definite shape nor a definite volume. The molecules in a gas are far apart. The intermolecular force of attraction between the molecules is very weak, and the intermolecular space is large.
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संबंधित प्रश्न
Ice melts at 100°C.
Water evaporates only at 100°C.
State three characteristics of molecules of matter.
Explain the change of a solid into a liquid at a constant temperature.
Write true or false for the statement. Rewrite the false statement correctly.
If the intermolecular space is more than the intermolecular force will be weaker.
For the following statement, say whether it describes a solid, a liquid, or a gas.
Particles are quite close together.
Give two examples for of the following
Substances which do not change their states.
Differentiate between living and non-living matter.
Match the arrangement of atoms in the three states of matter in List I with the correct state in List II.
| List I | List II |
| 1. Arrangement of atoms is far apart | A: Solids |
| 2. Force of attraction between atoms is very strong | B: Liquids |
| 3. Movement of atoms is in any random direction | C: Gases |
| 4. Particles diffuse very easily | |
| 5. Particles show movement about their own position |
What are the similarities between a gas and a liquid?
