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प्रश्न
Give reason of Why do liquids and gases flow but solids do not ?
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उत्तर
The molecules of liquids and gases are far apart i.e.
have more gaps, intermolecular attraction force is very less as compared to solids, hence liquids and gases can flow but solids do not as gaps in solid molecules is less and molecular force of attraction very strong.
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संबंधित प्रश्न
Give reason for the following.
Pure substances have fixed melting or boiling points.
Write whether the following statement is true or false.
Solids have the largest inter-molecular space.
Match the following
| Column A | Column B |
| (a) Solids | (1) Can flow in all directions. |
| (b) Sublimation | (2) The temperature at which a liquid changes into its gaseous state. |
| (c) Boiling point | (3) Any number of free surfaces. |
| (d) Gases | (4) Gaps between particles. |
| (e) Intermolecular space | ro(5) Change of state fm solid to gas. |
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 |
Give two examples of the following:
Substances which are rigid and not compressible.
A kind of matter which can sublinje is
- water
- plastic
- milk
- iodine
Give reason of A gas fills up the space available to it.
Differentiate the general properties of solids, liquids and gases in the form of a table — with reference to free surfaces.
Fill in the blank:
Particles in a gas possess ___________ kinetic energy.
The Cow and Birds are nonliving things.
