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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
Evaporation of a liquid causes cooling.
Fill in the blank
A solid exerts pressure .....................
Fill in the blank
The physical state of a substance, which has a fixed volume but no fixed shape is ...............
Write whether the following statement is true or false.
The intermolecular force of attraction is the weakest in gases.
Name the phenomenon which cause the following change.
Formation of water vapour from water.
Name the phenomenon which cause the following change.
Conversion of ice into water.
Give two examples for each type of matter
Differentiate between living and non-living matter.
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 |
Match the characteristics of the three states of matter in List I with their correct answer from List II.
| List I | List II |
| 1. Are highly rigid and have a definite shape | A: Solids and gases only |
| 2. Have no definite shape | B: Solids only |
| 3. Have definite volume but no definite shape | C: Liquids and gases only |
| 4. Are highly compressible and least rigid | D: Gases only |
| 5. Have no definite volume | E: Solid, liquids and gases |
| 6. Have no definite shape and volume |
F: liquids only |
| 7. Occupy space | G: Solids and liquids only |
| 8. Are not compressible | |
| 9. Are slightly compressible | |
| 10. Have mass |
