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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
Give reasons for the following observation:
The smell of hot sizzling food reaches you several metres away, but to get the smell from cold food you have to go close.
Match the columns.
| (1) iron and gold | (a) molecules are very far apart |
| (2) melting | (b) pure substance |
| (3) intermolecular space | (c) non - metals |
| (4) compound | (d) the space between the molecules |
| (5) gases | (e) change from solid to liquid |
| (f) metals |
A kind of matter which can sublinje is
- water
- plastic
- milk
- iodine
Give reason:
A drop of ink added to water in a glass turns whole water blue.
Give reason of A gas fills up the space available to it.
Which single term is used to describe the mixing of copper sulphate and water kept in a beaker, on its own?
Differentiate the general properties of solids, liquids and gases in the form of a table — with reference to volume.
State in which of the three states of matter:
The force of attraction between the particles is very weak.
Give a reason for the following:
Liquids have one free upper surface only.
State in which of the following examples ie. a piece of wood, water, light gas is the Inter-particle attraction maximum.
