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प्रश्न
Classify the following as chemical or physical change:
Cutting of trees
विकल्प
Chemical change
Physical change
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उत्तर
Physical change
Explanation:
Cutting down trees changes their physical shape and size, but does not change their chemical composition or nature. Hence it is classified as a physical change.
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संबंधित प्रश्न
Classify the following as chemical or physical change:
Boiling of water to form steam.
What are reversible and irreversible changes ? Give one example for each.
Match the columns.
| Column A | Column B |
| 1. a change which cannot be easily reversed | a. man-made change |
| 2 a change that repeats itself at regular intervals | b. chemical chang |
| 3. a change that is made by humans | c. physical change |
| 4. a change in which the original substance cannot be obtained | d. periodic change |
| 5. a change where no new substance is formed | e. irreversible change |
| f . slow change |
Write true or false
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Give four difference between physical and chemical changes.
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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.
Natural changes which take place in nature on their own, are beyond the control of human being.
