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प्रश्न
Classify the following as chemical or physical change:
Rusting of almirah
पर्याय
Chemical change
Physical change
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उत्तर
Chemical change
Explanation:
Rusting of an almirah is a chemical alteration because it produces a new chemical molecule known as hydrated iron oxide (rust).
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संबंधित प्रश्न
Classify the following as chemical or physical change:
Cutting of trees
Melting of solid (wax) is a physical change.
State three differences between evaporation and boiling
Tick the most appropriate answer.
Physical changes are
Which of the following are physical changes and which are chemical changes ?
Rusting of iron
Given reason:
Freezing of water to ice and evaporation of water are physical changes.
Given reason:
Cutting of a cloth piece is a physical change, though it cannot be reversed.
Differentiate between a physical change and a chemical change with reference to – Energy change taking place during the respective change.
Match the examples of changes in List I with the correct.
| List I | List II |
| 1. Expansion of a steel rod on heating | A: Physical change |
| 2. Rotting of eggs | B: Chemical change |
| 3. Milk turning sour | |
| 4. Tarnishing of copper | |
| 5. Separation of naphthalene from a mixture of naphthalene and sodium chloride. |
Select the chemical changes from the following list of changes
Glowing of an electric bulb.
