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प्रश्न
Why can a piece of chalk be broken easily into smaller pieces while a coal piece cannot be broken easily?
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उत्तर
The particles of matter have force acting between them. This force keeps the particles together. The strength of this force of attraction is lesser in chalk, hence it could be broken easily into smaller pieces.
But the strength of inter-molecular force of attraction is very strong in coal, therefore it is not possible to break them into small pieces.
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संबंधित प्रश्न
What are the characteristics of particles of matter?
What do you observe when a gas jar which appears empty is inverted over a gas jar containing Bromine vapours? Name the phenomenon.
What are the two conditions for the interconversion of states of matter ?
A solid is a state of matter that has
- no definite shape.
- large intermolecuiar space.
- high intermolecuiar force of attraction.
- no definite volume.
Which of the following is a property of the liquids ?
- they can flow
- they are malleable
- they have a definite shape
- they are rigid
Give reason Gases can be compressed easily .
Give reason
When an empty gas jar is inverted over a gas jar containing a coloured gas, the gas also spreads into the empty jar.
Give an experiment to explain that there are intermolecular spaces between water molecules.
In which of the following conditions, the distance between the molecules of hydrogen gas would increase?
- increasing pressure on hydrogen contained in a closed container
- some hydrogen gas leaking out of the container
- increasing the volume of the container of hydrogen gas
- adding more hydrogen gas to the container without increasing the volume of the container
State in which of the three states of matter:
The movement of the particles is neither about their own positions nor in any random direction.
