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प्रश्न
Classify the following as a physical or a chemical change.
Manufacture of salt from sea water
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उत्तर
Physical change
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संबंधित प्रश्न
Classify the following as chemical or physical change:
Cutting of trees
How do you say that the process of digestion is a chemical change ?
True or false
Dissolving of a solid in liquid is a physical change.
Which of the following are physical changes ?
- melting of iron metal
- rusting of iron metal
- bending of an iron rod
- drawing a wire of iron metal
Fill in the blank.
The process of a liquid changing into a solid is called ________
Differentiate between a physical change and a chemical change with reference to – Energy change taking place during the respective change.
Select the correct answer from the choice given below to complete the sentence
The dissolution of lead nitrate in water is deemed as a _________ change.
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 |
Which of the following is a physical change?
Mention a few physical properties of a substance.
