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प्रश्न
State three characteristics of molecules of matter.
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उत्तर
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Molecules are very small:
- Molecules are tiny particles that cannot be seen with the naked eye. They make up all matter, such as solids, liquids, and gases.
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Molecules are always moving:
- In solids, molecules vibrate in fixed positions.
- In liquids, they move more freely.
- In gases, they move very fast and spread in all directions.
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Molecules are held together by forces:
- Molecules are held together by attractive forces called intermolecular forces. These forces are strongest in solids, weaker in liquids, and weakest in gases.
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संबंधित प्रश्न
Fill in the blank
The molecular motion in liquid and gas is in ................. path.
Fill in the blank
In a solid, the molecules ............................................ but they remain at their fixed positions.
Name the three states of matter.
Give a reason for the Gases can be compressed easily.
Give a reason for the Pure substances have fixed melting or boiling points.
Fill in the blank
Water is a matter because it has ............ and occupies ............
Write true or false for the statement. Rewrite the false statement correctly.
Solids can be compressed easily.
Multiple choice question.
There are large intermolecular gaps in
Name the three states of matter and define them.
State the correct term from A, B, C, D, E, or F in List II which represents the change of state of matter or its relevant property from List I.
| List I | List II |
| 1. Solid 'X' to a Liquid 'X' | A: Condensation |
| 2. Liquid 'Y' to its vapour 'Z' | B: Vaporization |
| 3. 'Z' to 'Y' | C: Melting |
| 4. 'Y' to 'X' | D: Freezing |
| 5. The temperature at which 'Y' changes to 'Z' | E: Melting point |
| F: Boiling point |
