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प्रश्न
Fill in the blank
Heat is ________ by a gas during the process of condensation.
उत्तर
Heat is released by a gas during the process of condensation.
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संबंधित प्रश्न
Classify the following as chemical or physical change:
Melting of butter in a pan
Classify the following as chemical or physical change:
Boiling of water to form steam.
Changes in which only ______ properties of a substance change are called physical changes.
Tick the most appropriate answer.
5. Photosynthesis requires
- heat energy.
- wind energy
- sunlight.
- sound energy
True or false
Is melting of ice a reversible change?
Classify the following as physical or chemical change :
Growth of a plant
Given reason:
Freezing of water to ice and evaporation of water are physical changes.
Select the chemical changes from the following list of changes
Change of seasons
Give the reason why the following is considered as chemical changes.
An iron nail kept open in the atmosphere rusts.
In a solution of salt in water, water is the solute
