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प्रश्न
What is a physical change ? Give two examples of physical changes.
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उत्तर
Physical change: These are changes in which no new substances are formed. These are temporary changes, which are easily reversible. The substance, which is involved in a physical change, does not lose its identity.
Examples:
- Water, if boiled, can be cooled and condensed.
- Mixing of iron fillings with sand is a physical change because they can be separated by a magnet.
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संबंधित प्रश्न
Classify the changes involved in the following process as physical or chemical changes:
Photosynthesis
Ripening of fruits is a desirable change.
Photosynthesis cannot take place at night.
What are reversible and irreversible changes ? Give one example for each.
Classify the following as physical or chemical change :
Condensation of steam
Classify the following as physical or chemical change :
Growth of a plant
Fill in the blank with the appropriate word of the statement given below:
Germination of seeds is considered a __________ change.
Select the chemical changes from the following list of changes
Change of seasons
Name the following.
The salt obtained when a chemical change takes place on the addition of iron to dilute sulphuric acid.
When ice melts to form water, change occurs in its
