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प्रश्न
Give the molecular model for a solid and use it to explain why a solid has a definite volume and a definite shape.
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उत्तर
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 do not move about their mean position and thus solids have a definite shape and volume.
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संबंधित प्रश्न
The temperature of a substance remains unaffected during its change of state.
Evaporation of a liquid causes cooling.
Water evaporates only at 100°C.
Distinguish between solids, liquids, and gases on the basis of their following properties :
(a) compressibility
(b) fluidity
(c) rigidity
(d) expansion on heating
Give reason :
Liquids have a definite volume but no definite shape.
Fill in the blank
Water boils at .............
Fill in the blank
The physical state of a substance, which has a fixed volume but no fixed shape is ...............
Fill in the blank
When a gas is cooled, its molecules .............. energy.
Write true or false for the statement. Rewrite the false statement correctly.
The intermolecular space in a gas is almost negligible.
Multiple choice question.
Gases
