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प्रश्न
Write whether the following statement is true or false.
A gas has no free surface.
विकल्प
True
False
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उत्तर
True
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संबंधित प्रश्न
Fill in the blank:
The molecules are made up of ________
Give reason Pure substances have fixed melting or boiling point .
For the following statements, say whether it describes a solid, a liquid or a gas.
Particles are far apart and move in all directions
What do you mean by inter-molecular forces?
Write true or false for the statement. Rewrite the false statement correctly.
The smallest part of an element capable of independent existence is called an atom.
Multiple choice question.
All kinds of matter
The intermolecular force is _______ in the particles of solid.
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 |
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 sherbat has sweet, sour and salty taste and it can be poured in a glass.
