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प्रश्न
When ice melts to form water, change occurs in its
विकल्प
position
colour
physical state
composition
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उत्तर
Physical state
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संबंधित प्रश्न
Classify the following as chemical or physical change:
Passing of electric current through water, and water breaking down into hydrogen and oxygen gases.
A physical change is temporary. Explain.
State four differences between physical and chemical changes.
Write true or false
Burning of paper and formation of curd are reversible changes.
Photosynthesis cannot take place at night.
What is a physical change ? Give two examples of physical changes.
Give a reason why rusting of iron is a chemical change but, the magnetization of iron is a physical 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 |
Water is the universal solvent. Why?
Keeping a stone in sunlight for few hours is ______.
