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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
Name a chemical change which takes place in presence of:
State whether the following is physical or chemical changes.
cutting wood into small pieces —
Which of the following are physical changes and which are chemical changes ?
Classify the following as a physical or a chemical change.
Drying of wet clothes
Change is the law of nature and occurs in our everyday life, at all times and in all places. Differentiate between the following change with a suitable example.
Desirable and undesirable change.
Select the chemical changes from the following list of changes
Glowing of an electric bulb.
Give the reason why the following is considered as chemical changes.
Copper carbonate on heat gives copper oxide and carbon dioxide.
Digestion of food is a physical change.
Which of the following is not a physical change?
Adding sugar to milk is a physical change.
