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प्रश्न
Select the correct answer from the choice given below to complete the sentence
The energy required for completion of a physical change is ______________ when the change is reversed.
पर्याय
released
absorbed
उत्तर
The energy required for completion of a physical change is released when the change is reversed.
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संबंधित प्रश्न
Classify the following as chemical or physical change:
Cutting of trees
State three differences between evaporation and boiling
State whether the following is physical or chemical changes.
respiration in living beings —
Write true or false
Earthquake is a desirable change.
Write true or false
Dissolving of solute in a solvent and rusting of iron are both physical changes.
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 crystallisation of salt from its solution.
Iron pipes coated with zinc do not get rusted easily.
Mention a few physical properties of a substance.
Explain the characteristics of physical change with examples.
