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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
Give reasons:
A gas can fill the whole vessel in which it is enclosed.
Classify the following into solids, liquids and gases.
Oxygen, milk, common salt, wax, stone, water vapour, carbon-dioxide, sugar, mercury, coal, blood, butter, copper, coconut oil, kerosene.
Write your observation and conclusion for the following.
When a small stone is gently dipped into a glass filled with water.
Match the following
| Column A | Column B |
| (a) Solids | (1) Can flow in all directions. |
| (b) Sublimation | (2) The temperature at which a liquid changes into its gaseous state. |
| (c) Boiling point | (3) Any number of free surfaces. |
| (d) Gases | (4) Gaps between particles. |
| (e) Intermolecular space | ro(5) Change of state fm solid to gas. |
Match the columns.
| (1) iron and gold | (a) molecules are very far apart |
| (2) melting | (b) pure substance |
| (3) intermolecular space | (c) non - metals |
| (4) compound | (d) the space between the molecules |
| (5) gases | (e) change from solid to liquid |
| (f) metals |
Give two examples of the following:
Substances which are rigid and not compressible.
A substance which can change its state
- wood
- oxygen
- paper
- cloth
How will you prove by an experiment that solids occupy space ?
A solid is a state of matter that has
When an incense stick (agarbatti) is lighted in one corner of a room, its fragrance spreads in the whole room quickly. Which characteristic of the particles of matter is illustrated by this observation?
