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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 following as chemical or physical change:
Dissolving common salt in water.
Write true or false for the statement.
Burning of paper and formation of curd are reversible changes
State the various conditions that favour the process of evaporation.
Make a list of different types of changes with example.
State three differences between evaporation and boiling
What are man-made changes ?
Explain the term – ‘sublimation’. Is sublimation of naphthalene – a physical or a chemical change. Give reasons.
Select the correct answer from the choice given below to complete the sentence
The matter is added or removed during a ____________ change.
Wood to sawdust:______:: Wood to Ash: Chemical change
Iron pipes coated with zinc do not get rusted easily.
