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प्रश्न
Distinguish physical and chemical changes.
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उत्तर
1. Physical changes:
- No new substance is formed
- Reversible
- Change in physical properties like size, shape, state
- Melting of ice, tearing of paper freezing, evaporation vaporization
2. Chemical changes:
- New substance is formed
- Irreversible
- Change in properties of reactants and products
- Burning of paper, photosynthesis, digestion of food, rusting of iron
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संबंधित प्रश्न
Try segregating the things around you as pure substances or mixtures.
Write short answer.
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State whether the following is physical or chemical changes.
lightning —
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Earthquake is a desirable change.
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State whether the following statement is true or false. If false write the correct statement.
Melting of butter and wax are examples of chemical changes.
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The final product of the physical change involved during the ‘melting of a piece of wax’.
Select the chemical changes from the following list of changes
The crystallisation of salt from its solution.
What type of change is colouring of a paper?
When solute is dissolved in a solvent it forms a solution.
