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प्रश्न
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.
पर्याय
True
False
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उत्तर
False
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संबंधित प्रश्न
Write your observation and conclusion for the following:
Ice is kept at room temperature.
Fill in the blank
Liquids have no definite ______
For the following statements, say whether it describes a solid, a liquid or a gas.
Particles move about very quickly.
A substance which can change its state
Give one difference between atoms and molecules.
Differentiate between the following:
Atoms and molecules
Match the following
| Column A | Column B |
| (a) Solids | (i) Can flow in all directions |
| (b) Sublimation | (ii) The temperature at which a liquid changes into its gaseous state. |
| (c) Boiling point | (iii) Any number of free surfaces. |
| (d) Gases | (iv) Gaps between particles. |
| (e) Intermolecular space | (v) Changes of state from solid to gas. |
Match the column.
| Column A | Column B |
| 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. changes from solid to liquid |
| f. metals |
Write scientific reason.
Lemon sherbat has 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.
