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प्रश्न
Fill in the blank
When a gas is cooled, its molecules ________ energy,
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उत्तर
When a gas is cooled, its molecules loose energy,
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संबंधित प्रश्न
For the following statement, say whether it describe a solid, a liquid or a gas.
Particles are quite close together.
Give two examples of the following:
Substances which do not change their states.
The state of matter which has no definite shape or volume is called
- solid
- liquid
- gas
- water
The process by which a solid changes into a liquid is called
- freezing
- melting
- condensation
- evaporation
Gases
- cannot be compressed easily,
- occupy the entire space of the container.
- have definite shapes.
- cannot flow.
Give reason:
A drop of ink added to water in a glass turns whole water blue.
Give reason of The odour of scent spreads in a room.
Fill in the blank
Matter is anything that has ______ and occupies ______
Which one of the following statements is not true?
- the molecules in a solid vibrate about a fixed position
- the molecules in a liquid are arranged in a regular pattern
- the molecules in a gas exert negligibly small forces on each other, except during collisions
- the molecules of a gas occupy all the space available
Differentiate the general properties of solids, liquids and gases in the form of a table — with reference to free surfaces.
