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प्रश्न
Give two example of the following:
The substances which do not change their state on heating.
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उत्तर
Gases do not change their state on heating.
Example: O2.
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संबंधित प्रश्न
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.
Fill in the blank:
The physical state of a substance, which has a fixed volume but no fixed shape is .........
For the following statement, say whether it describe a solid, a liquid or a gas.
Particles are quite close together.
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 piece of chalk can be broken into small particles by hammering but a piece of iron cannot be taken into small particles by hammering. Which characteristic of the particles of matter is illustrated by these observations?
Differentiate the general properties of solids, liquids and gases in the form of a table — with reference to density.
Give a reason why –
Solids have a definite volume & a definite shape.
Fill in the blanks:
Matter is defined as anything that occupies _______ and has _______
Among the following ______ is not a mixture.
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 |
