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प्रश्न
What are the forces of cohesion and adhesion?
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उत्तर
The force of attraction between the molecules of a similar kind is called a force of cohesion.
Example: The attraction between water molecules, keeping a water droplet together.
The force of attraction between different types of molecules is called a force of adhesion.
Example: The attraction between water and a glass surface, causing water to stick to the glass.
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संबंधित प्रश्न
Classify the following into solid, liquid and gas:
Coal, kerosene, wood, oxygen, sugar, blood, water vapour, milk, wax.
Fill in the blank
Liquids have no definite ______
A substance which can change its state
Select the correct alternative
The inter-molecular forces in liquids are
What do you mean by inter-molecular forces?
What is volume?
Define Intermolecular force
Write your observation and conclusion for the following:
When a small stone is gently dipped into a glass filled with water.
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 'Y' | A: Liquefaction |
| 2. Liquid 'Y' to its vapour 'Z' | B: Vaporization |
| 3. 'Z' to 'Y' | C: Melting |
| 4. 'Y' to 'X' | D: Solidification |
| 5. The temperature at which 'Y' changes to 'Z' | E: Melting Point |
| F: Boiling point |
Give a reason for the following:
A crystal of iodine on slow heating in a closed flask turns into vapours and fills the complete flask.
