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प्रश्न
What type of energy changes is associated when ice melts?
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उत्तर
- Physical change
- Endothermic (heat energy is absorbed)
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संबंधित प्रश्न
State whether the following is physical or chemical changes.
Slaking of lime —
Tick (√) the correct alternative from the choice given for the following statement
A pop sound is heard when a lighted match stick is brought near the mouth of a jar. This indicates the release of gas.
True or false
Dissolving of a solid in liquid is a physical change.
Photosynthesis cannot take place at night.
Classify the following as physical or chemical change :
Condensation of steam
Fill in the blank.
There is no change in the _____________of the substance during a physical change.
Explain the term – ‘sublimation’. Is sublimation of naphthalene – a physical or a chemical change. Give reasons.
Photosynthesis is a natural process by which green plants manufacture food in the presence of sunlight.
State the conclusions which can be drawn, to represent photosynthesis as a physical or a chemical change.
Fill in the blank with the appropriate word of the statement given below:
If a change is permanent and irreversible it is considered a _________ change.
Analogy:
Melting of ice: Physical change.
Popping of popcorn: ______.
