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प्रश्न
When an incense stick (agarbatti) is lighted in one corner of a room, its fragrance spreads in the whole room quickly. Which characteristic of the particles of matter is illustrated by this observation?
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उत्तर
The spreading of fragrance of incense stick from a corner to the whole room indicates that particles of matter keep moving from higher to lower concentration.
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संबंधित प्रश्न
Write whether the following statement is true or false.
The intermolecular force of attraction is the weakest in gases.
Give two examples of the following:
Substances which do not change their states.
Fill in the blank
Molecules in a ________ are packed very closely.
What is meant by 'diffusion'? Give one example of diffusion in gases.
Define the Solid and give two examples.
Match the characteristics of the three states of matter in List I with their correct answer from List II.
| List I | List II |
| 1. Have no definite shape, volume or free surface | A: Solids only |
| 2. Are highly compressible and least rigid | B: Liquids only |
| 3. Have a definite volume, no definite shape and are slightly diffusable | C: Gases only |
| 4. Are not compressible and have no diffusability | D: Liquids and gases only |
| 5. Have mass and occupy space | E: Solids and gases only |
| F: Solids, liquids and gases |
In which of the three states of matter – solids, liquids, or gases is the movement of atoms about their own position. Give a reason for the same.
Complete the statement by filling the blank with the correct word given below.
In naphthalene, the inter-particle attraction is _______.
Air is not compressible.
You are provided with a mixture of naphthalene and ammonium chloride by your teacher. Suggest an activity to separate them with well labelled diagram.
