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प्रश्न
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 |
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उत्तर
| Column A | Column B |
| 1. a change which cannot be easily reversed | e. irreversible change |
| 2 a change that repeats itself at regular intervals | d. periodic change |
| 3. a change that is made by humans | a. man-made change |
| 4. a change in which the original substance cannot be obtained | b. chemical chang |
| 5. a change where no new substance is formed | c. physical change |
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संबंधित प्रश्न
Tick the most appropriate answer.
3. Physical changes are
- permanent.
- periodic,
- temporary
- irreversible.
Make a list of different types of changes with example.
Make a list of different types of changes with example.
Separate the following into physical and chemical changes :
Sublimation of a solid, Decomposition of water into hydrogen and oxygen by passing electric current, Formation of clouds, Making a fruit salad from raw fruits, Dissolving carbon dioxide in water
State what is meant by the term – interconversion of matter. Is interconversion of matter a physical change or a chemical change.
Match the following
| Sr. No. | A | B | C |
| 1. | Melting | Change of state from liquid to solid | Ticking of clock |
| 2. | Condensation | Change of state from liquid to gas | Formation of ice cube |
| 3. | Evaporation | Change of state from solid to liquid | Collecting flowers |
| 4. | Freezing | Change of state from gas to liquid | Ice cube to water |
| 5. | Periodic change | Occurs at irregular time intervals | Water to steam |
| 6. | Non-periodic change | Occurs at regular time intervals | Steam to water drops |
Physical Change: Boiling::Chemical Change: ______.
What kind of change is shown by tearing of paper?
Iron pipes coated with zinc do not get rusted easily.
Mention a few physical properties of a substance.
