Advertisements
Advertisements
Question
What are the forces of cohesion and adhesion?
Advertisements
Solution
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
RELATED QUESTIONS
Under what conditions do solids, liquids and gases change their state.
Name the terms for the process due to which a solid directly changes into its vapours.
Write whether the following statement are true or false.
There is no difference between evaporation and boiling.
If an object is taken to the moon from the earth what will be its mass?
Write your observation and conclusion for the following:
When a small stone is gently dipped into a glass filled with water.
Write whether the following statement is true or false.
There is no difference between evaporation and boiling.
Match the following
| Column A | Column B |
| (a) Solids | (i) Can flow in all directions |
| (b) Sublimation | (ii) The temperature at which a liquid changes into its gaseous state. |
| (c) Boiling point | (iii) Any number of free surfaces. |
| (d) Gases | (iv) Gaps between particles. |
| (e) Intermolecular space | (v) Changes of state from solid to gas. |
Fill in the blank:
Matter made up of one kind of particle is said to be _________.
Write scientific reasons.
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.
