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Question
Tick the most appropriate answer.
Physical changes are
Options
permanent
periodic
temporary
irreversible
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Solution
temporary
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Classify the following as chemical or physical change:
Dissolving common salt in water.
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A natural change can also be a desirable change
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Read the paragraph and note down the various types of changes it mentions.
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Match the examples of changes in List I with the correct type of change in List II.
| List I | List II |
| 1. Burning of paper | A: Physical change |
| 2. The ringing of an electric bell | B: Chemical change |
| 3. Curdling of milk | |
| 4. Electric light is switched on | |
| 5. Melting of butter |
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Water is the universal solvent. Why?
A physical change is generally____________.
Cutting a log of wood into pieces is a chemical change.
Mention some of the different conditions needed for chemical changes to occur.
