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प्रश्न
Differentiate between a physical change and a chemical change with reference to – Energy change taking place during the respective change.
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उत्तर
| Physical change | Chemical change |
| Generally, energy is neither absorbed nor released during the change. | Generally, energy is either absorbed or evolved during change. |
| Example: Melting of ice, melting of the wax. | Example: Change of milk into curd and burning of a candle. |
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संबंधित प्रश्न
Melting of solid (wax) is a physical change.
Classify the following changes as physical or chemical:-boiling
Fill in the blank
Revolution of the earth around the sun is a ________ change.
Fill in the blank.
Growing of a seedling into a plant is _______ change.
Give two examples of periodic changes.
Classify the following as a physical or a chemical change.
Boiling of water
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.
Give a reason why
Freezing of water is a reversible change while burning of a candle – an irreversible change.
Select the chemical changes from the following list of changes
Breaking of glass
Name the following.
The product obtained during a physical change when water converts from a liquid into a solid.
