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प्रश्न
Given reason:
Freezing of water to ice and evaporation of water are physical changes.
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उत्तर
Freezing of water to ice and evaporation of water are physical change because water can be brought back to its original (liquid) form by
- We can heat the ice to bring it back to water.
- We can cool down the vapours to bring it back to water.
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संबंधित प्रश्न
Tick the most appropriate answer
2. Melting of ice is a
- reversible change
- irreversible change
- chemical change
- none of these
Fill in the blank
Chemical change occurs as a result of __________ between two substances.
True or false
Change of seasons is a non-periodic change.
Classify the following as a physical or a chemical change.
Boiling of water
Ammonium chloride is also a sublimable solid. Give a reason why the sublimation of ammonium chloride involves a physical and a chemical change.
When ice melts to form water, change occurs in its
Digestion of food is a physical change.
What type of energy changes is associated when ice melts?
______ is the Universal Solvent.
Keeping a stone in sunlight for few hours is ______.
