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प्रश्न
Write your observation and conclusion for the following:
Ice is kept at room temperature.
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उत्तर
Ice when kept at room temperature again changes back into liquid water.
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संबंधित प्रश्न
Differentiate between the following.
Liquids and gases .
If an object is taken to the moon from the earth what will be its mass?
Define the Intermodular force of attraction.
Give reason :
The odour of scent spreads in a room.
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The molecules are at a greater distance in ........ compared to liquids.
Fill in the blank
All matter is made up of tiny particles called .................
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 |
Identify the odd term out and explain.
Hydrogen, sodium, potassium, carbon
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.
