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प्रश्न
What are the three states of matter ? Define each of them with two examples.
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उत्तर
The three states of matter are solids, liquids and gases :
- Solids - A solid has a definite shape and definite volume.
Example – wood, stone, iron, ice etc. - Liquid - A liquid has a definite volume but not definite shape.
Example - water, juice, milk, oil, etc. - Gases - A gas neither has definite shape nor a definite volume.
Example - air, hydrogen, oxygen, watervapour etc.
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संबंधित प्रश्न
Why liquids do not have a definite shape ?
Give reason for the following.
Liquids can flow easily.
Define the following term.
Intermolecular force
Give reason:
The odour of scent spreads in a room.
Give an experiment to explain that there are intermolecular spaces between water molecules.
Differentiate between the following.
Atoms and molecules
Write true or false for statement. Rewrite the false statement correctly.
The intermolecular space in a gas is almost negligible.
State the main postulates of the kinetic theory with special reference to – Energy possessed by particles of matter.
With reference to inter-conversion of matter – on the basis of kinetic theory – explain in brief the conversion of A liquid into vapour [or gas] With special reference to inter-particle space & interparticle attraction at the different stages of conversion.
On the basis of kinetic theory explain why ammonium chloride sublims and goes from solid-state directly into vapour state.
