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प्रश्न
Discuss the three states of matter solid, liquids and gas on the basis of molecular model.
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उत्तर
Solids
Here the molecules are very tightly packed that there is no or very less intermolecular space and there is a high intermolecular force of attraction (force of cohesion). The molecules in a solid can only vibrate to and fro about their mean positions. They do not leave their positions.
Liquids
Here the molecules are less tightly packed as compared to solids and also there is a lesser force of intermolecular attraction. The intermolecular distance is greater than that in the solids. Thus, they do not have a definite shape but acquire the shape of the vessel in which they are contained but have a definite volume at a given temperature.
Gases :
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संबंधित प्रश्न
The process of a gas converting directly into solid is called vaporization.
The melting point of ice is 0°C.
Fill in the blank
The gases are .......... dense.
Distinguish between solids, liquids, and gases on the basis of their following properties :
(a) compressibility
(b) fluidity
(c) rigidity
(d) expansion on heating
Write whether the following statement is true or false.
The intermolecular force of attraction is the weakest in gases.
Write true or false for the statement. Rewrite the false statement correctly.
Solids can be compressed easily.
For the following statement, say whether it describes a solid, a liquid, or a gas.
Particles move about very quickly.
Give two examples for of the following
Substances which are rigid and not compressible.
Multiple choice question.
Which of the following is a property of the liquids?
Match the following
| Column A | Column B | ||
| a | Solids | 1 | Can flow in all directions |
| b | Sublimination | 2 | The temperature at which a liquid changes into its gaseous state |
| c | Boiling Point | 3 | Can have any number of free surfaces |
| d | Gases | 4 | Gaps between particles |
| e | Intermolecular space | 5 | Change of state from solid to gas |
