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प्रश्न
Given reason:
Freezing of water to ice and evaporation of water are physical changes.
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
Write short answer.
Sublimation is classified as a physical change. Why ?
Classify the following changes as physical or chemical:- melting of a solid (wax)
Write true or false
Earthquake is a desirable change.
True or false
Is melting of ice a reversible change?
Write true or false
Deforestation is a man-made change.
Classify the following as a physical or a chemical change.
Butter getting rancid
Classify the Following as a Physical Or a Chemical Change.
Making of a Sugar Solution
State which of the following terms connected with change of state of matter i.e.
(a) Melting
(b) Vaporisation
(c) Condensation
(d) Freezing
pertain to –
- Conversion of a liquid into a vapour or gas.
- Conversion of a liquid into a solid.
- Conversion of a solid into a liquid on heating.
Select the chemical changes from the following list of changes
The occurrence of lightning.
Wood to sawdust:______:: Wood to Ash: Chemical change
