Advertisements
Advertisements
प्रश्न
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 |
Advertisements
उत्तर
| Sr. No. | A | B | C |
| 1. | Melting | Change of state from liquid to solid | Ice cube to water |
| 2. | Condensation | Change of state from liquid to gas | Steam to water drops |
| 3. | Evaporation | Change of state from solid to liquid | Water to steam |
| 4. | Freezing | Change of state from gas to liquid | Formation of ice cube |
| 5. | Periodic change | Occurs at irregular time intervals | Ticking of clock |
| 6. | Non-periodic change | Occurs at regular time intervals | Collecting flowers |
APPEARS IN
संबंधित प्रश्न
Classify the following as chemical or physical change:
Rusting of almirah
Write true or false for the statement.
Burning of paper and formation of curd are reversible changes
Ripening of fruits is a desirable change.
Write short answer.
Give an example of desirable change which can also be undesirable
Define physical change. Give two examples for the above changes.
Which of the following are physical changes and which are chemical changes?
Burning of candle wax, Melting of candle wax, Mixing of iron filings and sand, Burning of wood, Breaking a piece of chalk, Burning a piece of paper, Cutting a piece of paper.
Name the following:
The final product of the physical change involved during the ‘melting of a piece of wax’.
State which of the following pertain to – chemical changes.
- Substance retains its identity.
- The change is permanent.
- No new substance is formed.
- Is easily reversible.
- Produces one or more new substances by a change in its composition.
- The change is temporary.
- The composition and properties of the original substance are not altered.
Name the following.
The product of the chemical change in keeping a polished iron nail exposed to the atmosphere.
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. |
