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प्रश्न
Give two examples for the following case:
Physical changes which are not reversible
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उत्तर
- Cutting of paper
- Breaking of glass
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संबंधित प्रश्न
Classify the following changes as physical or chemical:- photosynthesis in plants
Fill in the blank.
When a candle burns, wax melts. Melting of wax is a ________ change.
Fill in the blank
Revolution of the earth around the sun is a ________ change.
What is a physical change ? Give two examples of physical changes.
Classify the following as a physical or a chemical change.
Drying of wet clothes
Differentiate between a physical change and a chemical change with reference to – Formation of products.
Match the examples of changes in List I with the correct type of change in List II.
| List I | List II |
| 1. Burning of paper | A: Physical change |
| 2. The ringing of an electric bell | B: Chemical change |
| 3. Curdling of milk | |
| 4. Electric light is switched on | |
| 5. Melting of butter |
Name the following.
The product obtained during a physical change when water converts from a liquid into a solid.
Assertion: Burning of wood log to charcoal is a physical change.
Reason: The products formed of burning a piece of wood can be easily converted back to wood log.
A physical change is generally____________.
