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प्रश्न
State the term which refers to the conversion of a substance on heating from.
- solid-state to liquid state
- liquid state to vapour state
- vapour state to liquid state
- liquid state to solid-state.
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उत्तर
The terms which refer to the conversion of a substance are:
- Melting
- Vaporisation
- Liquefaction
- Solidification
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संबंधित प्रश्न
Fill in the blank:
The process in which a solid directly changes into a gas is called ....................
Why do solids, liquids and gases differ in their physical states ?
Give reason:
A red ink drop added to small amount of water in a glass turns water red in some time.
Fill in the blank:
Liquids have a definite ............
Name the phenomenon which cause the following change:
Formation of water vapour from water.
Fill in the blank:
The quantity of matter in an object is called its _____
Give reason of The odour of scent spreads in a room.
State two characteristics of matter demonstrated by diffusion.
What is meant by 'diffusion'? Give one example of diffusion in gases.
Give reasons for the following:
A bottle of perfume on opening evolves an odour which can be sensed over a long distance.
