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प्रश्न
Distinguish between the following.
Physical change and chemical change
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उत्तर
| Physical Change | Chemical Change | |
| 1. | The chemical composition of a substance does not change. | The chemical composition of a substance does not remain the same. |
| 2. | Easily reversible | Not easily reversible |
| 3. | No new substance is formed | New substances are always formed |
| 4. | Melting of ice is an example of physical change. | The burning of paper is an example of chemical change. |
संबंधित प्रश्न
Classify the following as chemical or physical change:
Making a fruit salad with raw fruits
Write true or false for the statement.
Deforestation is a man-made change
Ripening of fruits is a desirable change.
Classify the following changes as physical or chemical:-boiling
State whether the following is physical or chemical changes.
burning of sugar —
State whether the following is physical or chemical changes.
mixing oil with water —
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.
State which of the following 1 to 5 pertain to – A: Physical Change B: Chemical change :
- Sublimation.
- Fermentation.
- Liquefaction or condensation.
- Magnetization.
- Respiration.
Give the reason why the following is considered as chemical changes.
Sulphur when burnt in air evolves a gaseous acidic product.
Name the following.
A form of energy required for a chemical change.
