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प्रश्न
Name the three states of matter and define them.
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उत्तर
The three states of matter are solid, liquid and gaseous.
- Solid State: A solid has a definite shape and a definite volume. Molecules in the solid state are packed very close to each other. Intermolecular space is almost negligible, while the intermolecular force of attraction between the molecules is very strong in solids.
- Liquid State: A liquid has a definite volume but no definite shape. The molecules in the liquid are less closely packed than in solids. The intermolecular space is greater than solids. The molecules have a weaker intermolecular force of attraction; therefore, the liquid molecules have greater movement than solids, and hence, a liquid flows.
- Gaseous state: A gas has neither a definite shape nor a definite volume. The molecules in a gas are far apart. The intermolecular force of attraction between the molecules is very weak, and the intermolecular space is large.
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संबंधित प्रश्न
Explain the change of a solid into a liquid at a constant temperature.
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.
Why do solids, liquids, and gases differ in their physical states?
Why liquids do not have definite shape?
Give reason :
Why do liquids and gases flow but solids do not?
Give reason :
Liquids have a definite volume but no definite shape.
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.
Only water can exist in three different states.
Multiple choice question.
The state of matter which has no definite shape or volume is called
State the property of the following substance.
Hydrogen sulphide gas has a strong rotten egg odour.
