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प्रश्न
Define matter. What is its composition?
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उत्तर
Matter is defined as anything which occupies space and has mass. It can be perceived by our sense of smell, touch, sight, hearing, and taste.
Matter is composed of tiny particles known as atoms.
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संबंधित प्रश्न
Define: Solid
Define Intermolecular space.
Write whether the following statement are true or false.
A gas has no free surface.
For the following statements, say whether it describes a solid, a liquid or a gas.
Particles are quite close together
What is a molecule?
Describe a simple experiment to illustrate that molecules are not at rest, but they constantly move.
Fill in the blank
Molecules in a ............ are packed very closely.
Write scientific reason.
A solid matter has the properties of definite shape and volume.
State the correct term from A, B, C, D, E or F in List II which represents the – change of state of matter or its relevant property from List I
| List I | List II |
| 1. Solid 'X' to a liquid 'Y' | A: Liquefaction |
| 2. Liquid 'Y' to its vapour 'Z' | B: Vaporization |
| 3. 'Z' to 'Y' | C: Melting |
| 4. 'Y' to 'X' | D: Solidification |
| 5. The temperature at which 'Y' changes to 'Z' | E: Melting Point |
| F: Boiling point |
Match the arrangement of atoms in the three states of matter in List I with the correct state in List II.
| List I | List II |
| 1. Arrangement of atoms, very closely packed | A: Solids |
| 2. Interparticle space is maximum | B: Liquids |
| 3. Force of attraction between particles is very weak | C: Gases |
| 4. Movement of particles is about their own position | |
| 5. Particles in the state of matter are slightly compressible and not closely packed. |
