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प्रश्न
Fill in the blank:
The process in which a solid directly changes into a gas is called ....................
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उत्तर
The process in which a solid directly changes into a gas is called sublimation.
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संबंधित प्रश्न
Define the following terms.
Atom
Write whether the following statement is true or false.
If the container in which a gas is collected has an opening, the gas will flow out and spread itself indefinitely.
Write whether the following statement is true or false.
Solids have the largest inter-molecular space.
The process by which a solid changes into a liquid is called
- freezing
- melting
- condensation
- evaporation
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
Define: interconversion of states of matter.
Give a reason why –
Liquids have a definite volume but no definite shape.
Match the following.
| Property | Example |
| Breaks easily (Brittle) | Metal pan |
| Bends readily | Rubber band |
| Can be stretched easily | Cotton wool |
| Gets compressed easily | Mud pot |
| Gets heated readily | Plastic wire |
Mention any two characteristics of the particles of matter.
