Advertisements
Advertisements
प्रश्न
What are the forces of cohesion and adhesion?
Advertisements
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.
APPEARS IN
संबंधित प्रश्न
Write your observation and conclusion for the following:
When few marbles are put in a glass half-filled with water.
Define: Gas.
Why do solids, liquids and gases differ in their physical state?
Name the terms for the process due to which a solid directly changes into its vapours.
Define Element.
Write true or false for the statement. Rewrite the false statements correctly.
Matter cannot exist in different states.
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 |
Fill in the blank:
Matter made up of one kind of particle is said to be _________.
Write scientific reason.
Lemon sherbat has sweet, sour and salty taste and it can be poured in a glass.
Write scientific reason.
Lemon sherbat has sweet, sour and salty taste and it can be poured in a glass.
