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प्रश्न
You are given some candle wax. Can you make a candle doll from it? What kind of change is this?
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उत्तर
Yes, I can. It is a physical (reversible) change.
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संबंधित प्रश्न
Define physical change. Give two examples for the above changes.
Tick (√) the correct alternative from the choice given for the following statement
A pop sound is heard when a lighted match stick is brought near the mouth of a jar. This indicates the release of gas.
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| 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. |
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______ change.
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