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प्रश्न
State whether the following is physical or chemical changes.
growing of a piglet into a pig —
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उत्तर
chemical change,
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संबंधित प्रश्न
Tick the most appropriate answer.
4. Chemical changes involve
- change in shape.
- change in size.
- change in molecular composition.
- none of these
A physical change is temporary. Explain.
Fill in the blank
Chemical change occurs as a result of __________ between two substances.
State whether the following is physical or chemical changes.
burning of sugar —
State whether the following is physical or chemical changes.
lightning —
What are man-made changes ?
What is a physical change ? Give two examples of physical changes.
Fill in the blank.
The process of a liquid changing into a solid is called ________
State why addition of sodium chloride to water is considered a physical change, while addition of dilute sulphuric acid to zinc is considered a chemical change.
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 |
