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प्रश्न
Fill in the blank
All the molecules of a substance are .............
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उत्तर
All the molecules of a substance are identical.
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संबंधित प्रश्न
Define: Gas.
How a liquid changes into its gaseous state ? Explain ?
Fill in the blank
Liquids have no definite ______
Write whether the following statement are true or false.
All solids, on heating, first change to the liquid and then to the gaseous state always.
Select the correct alternative
The molecules ____________
Define Element.
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. |
Give a reason for the following:
An empty tumbler lowered into a glass beaker containing water, on tilting shows bubbles of air coming out, but when not tilted, no bubbles are seen.
Write scientific reason.
Lemon sharbat has a sweet, sour and salty taste and it can be poured in a glass.
Write scientific reason.
Lemon sherbat has sweet, sour and salty taste and it can be poured in a glass.
