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प्रश्न
Fill in the blank.
The process of a liquid changing into a solid is called ________
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उत्तर
The process of a liquid changing into a solid is called freezing.
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संबंधित प्रश्न
State four differences between physical and chemical changes.
Tick (√) the correct alternative from the choice given for the following statement.
A substance which can not sublime is
Write true or false
Burning of paper and formation of curd are reversible changes.
What are man-made changes ?
Classify the following as physical or chemical changes :
- Cooking of food
- Boiling of water
- Cutting of trees
- D0issolving salt in water
- Digestion of food
- Melting of ice
Classify the following as a physical or a chemical change.
Manufacture of salt from sea water
Differentiate between a physical change and a chemical change with reference to – Energy change taking place during the respective change.
Select the chemical changes from the following list of changes
The crystallisation of salt from its solution.
In a solution of salt in water, water is the solute
Match the following
| Sr. No. | A | B | C |
| 1. | Melting | Change of state from liquid to solid | Ticking of clock |
| 2. | Condensation | Change of state from liquid to gas | Formation of ice cube |
| 3. | Evaporation | Change of state from solid to liquid | Collecting flowers |
| 4. | Freezing | Change of state from gas to liquid | Ice cube to water |
| 5. | Periodic change | Occurs at irregular time intervals | Water to steam |
| 6. | Non-periodic change | Occurs at regular time intervals | Steam to water drops |
