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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
At high altitudes, water boils above 100° C.
The melting point of ice is 0°C.
Fill in the blank
A solid exerts pressure .....................
Fill in the blank
Any matter which has a definite ................. but no definite shape is called a ...............
Fill in the blank
The physical state of a substance, which has a fixed volume but no fixed shape is ...............
Fill in the blank
Liquids have a definite ............
Write whether the following statement is true or false.
The intermolecular force of attraction is the weakest in gases.
For the following statement, say whether it describes a solid, a liquid, or a gas.
Particles are far apart and move in all directions.
Multiple choice question.
There are large intermolecular gaps in
Match the characteristics of the three states of matter in List I with their correct answer from List II.
| List I | List II |
| 1. Are highly rigid and have a definite shape | A: Solids and gases only |
| 2. Have no definite shape | B: Solids only |
| 3. Have definite volume but no definite shape | C: Liquids and gases only |
| 4. Are highly compressible and least rigid | D: Gases only |
| 5. Have no definite volume | E: Solid, liquids and gases |
| 6. Have no definite shape and volume |
F: liquids only |
| 7. Occupy space | G: Solids and liquids only |
| 8. Are not compressible | |
| 9. Are slightly compressible | |
| 10. Have mass |
