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प्रश्न
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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उत्तर
| 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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संबंधित प्रश्न
Which of the following are chemical changes?
- Growth of a plant
- Rusting of iron
- Mixing of iron fillings and sand
- Cooking of food
- Digestion of food
- Freezing of water
- Burning of candle
Write true or false for the statement
A natural change can also be a desirable change
Tick the most appropriate answer.
Rising and setting of the sun at a given place is a
Classify the following as a physical or a chemical change.
Butter getting rancid
Classify the following as a physical or a chemical change.
Burning of coal
Fill in the blank.
There is no change in the _____________of the substance during a physical change.
Read the paragraph and note down the various types of changes it mentions.
It was nearing six o'clock in the evening. The sun was setting. A breeze was blowing. Leaves on the tree were shaking. Sahil was sitting in the courtyard, rolling balls of wet soil, and shaping them into various toys. Then he felt hungry and went into the house. Mother made a dough from wheat flour and fried purees. While eating hot purees, his attention was drawn outside the window. It had started raining. There was lightning, too. Sahil was enjoying his dinner in the dim light.
Change is the law of nature and occurs in our everyday life, at all times and in all places.
Differentiate between the following change with a suitable example.
Slow and fast change.
Water is known as a universal solvent. Why?
Water is the universal solvent. Why?
