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Question
Classify the following changes as physical and chemical changes
A rough piece of wood is sanded and polished resulting in change in texture, Rusting of a iron nail, Painting the grill, Bending a paper clip, Pounding silver into thin plate, Rolling the chappathi dough into thin wire, Occurrence of day and night, eruption of volcano, burning of matchstick, dosa from the batter, blinking of eyelids, occurrence of a thunderstorm, rotation of the earth, formation of eclipses.
| Sr. No. | Physical changes | Chemical changes |
| 1. | ||
| 2. |
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Solution
| Sr. No. | Physical changes | Chemical changes |
| 1. |
Bending a paper clip. |
Rusting of a iron |
| 2. |
Pounding silver into thin plate. |
Eruption of volcano |
| 3. |
Rolling a chapathi dough into thin wire. |
Burning of matchstick. |
| 4. |
Occurrence of a day and night. |
|
| 5. |
Blinking of eyelids. |
|
| 6. |
Occurrence of a thunderstorm. |
|
| 7. |
Rotation of the earth. |
|
| 8. |
Formation of eclipses. |
|
| 9. |
Painting the grill. |
|
| 10. |
A rough piece of wood is sanded and polished resulting in change in texture. |
|
| 11. |
Dosa from the batter. Dosa from the batter. |
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