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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
Explain why burning of wood and cutting it into small piece are considered as two different types of changes.
Write short answer.
Sublimation is classified as a physical change. Why ?
State whether the following is physical or chemical changes.
photosynthesis —
Make a list of different types of changes with example.
Give the main differences between physical changes and chemical changes.
Differentiate between a physical change and a chemical change with reference to – Nature of change is temporary and reversible or permanent and irreversible.
Name the following:
The term involved in the change of state from – ‘water to ice’ – which is a physical change.
Select the chemical changes from the following list of changes
The carbon cycle.
Higher order Thinking question
Boiling of water is a physical change; but boiling of egg is a chemical change. Why?
When solute is dissolved in a solvent it forms a solution.
