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प्रश्न
What type of energy changes is associated when ice melts?
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उत्तर
- Physical change
- Endothermic (heat energy is absorbed)
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संबंधित प्रश्न
Write true or false
Earthquake is a desirable change.
Tick (√) the correct alternative from the choice given for the following statement
A pop sound is heard when a lighted match stick is brought near the mouth of a jar. This indicates the release of gas.
Write true or false
A natural change can also be a desirable change.
Classify the Following as a Physical Or a Chemical change.
Glowing of an Electric Bulb
Define a chemical change. Give two examples of the above changes.
Fill in the blank with the correct word of the statement given below:
Sublimation involves a __________ change.
Select the correct answer from the choice given below to complete the sentence
A change in which a substance retains its identity is a
______ 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 |
Grinding of wheat grain changes its size. It is a ____________ change.
Mention a few physical properties of a substance.
