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प्रश्न
What happens when a solid is heated ?
उत्तर
When a solid is heated, its molecules gain energy and vibrate faster. A stage comes when they overcome intermolecular force of attraction and start moving from each other. This results in melting of solid.
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संबंधित प्रश्न
Match the following
| Column A | Column B |
| (a) Solids | (1) Can flow in all directions. |
| (b) Sublimation | (2) The temperature at which a liquid changes into its gaseous state. |
| (c) Boiling point | (3) Any number of free surfaces. |
| (d) Gases | (4) Gaps between particles. |
| (e) Intermolecular space | ro(5) Change of state fm solid to gas. |
Match the columns.
| (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) change from solid to liquid |
| (f) metals |
A kind of matter which can sublinje is
- water
- plastic
- milk
- iodine
If an object weighs 6 N on earth what will be its weight on moon. What will be the change in its mass?
Give reason of The odour of scent spreads in a room.
Give reason of Liquids have definite volume but no difinite shape.
Fill in the blank
The physical state of a substance, which has a fixed volume but no fixed shape is _______
Write whether the following statement are true or false.
Intermolecular force of attraction is greater in gases than in liquids.
Name the three states of matter.
Differentiate the general properties of solids, liquids and gases in the form of a table — with reference to compressibility.
