Advertisements
Advertisements
Question
Define physical change. Give two examples for the above changes.
Advertisements
Solution
Physical change: A temporary change in which no new substance is formed, the composition of substance remains the same, though its state, shape and size may change.
Example of physical change:
- Change of water into its vapours.
- Heating of iron rod.
RELATED QUESTIONS
Write true or false for the statement
A natural change can also be a desirable change
Photosynthesis cannot take place at night.
State the differences between a physical change and a chemical change.
Make a list of different types of changes with example.
State whether the following is physical or chemical changes.
(energy produced) dissolving sugar in water —
State whether the following is physical or chemical changes.
mixing oil with water —
Write true or false
Burning of paper and formation of curd are reversible changes.
State the various conditions that favour the process of evaporation.
Classify the Following as a Physical Or a Chemical Change.
Formation of Clouds
Classify the Following as a Physical Or a Chemical Change.
Curdling of Milk
Differentiate between a physical change and a chemical change with reference to – Formation of products.
Match the examples of changes in List I with the correct.
| List I | List II |
| 1. Expansion of a steel rod on heating | A: Physical change |
| 2. Rotting of eggs | B: Chemical change |
| 3. Milk turning sour | |
| 4. Tarnishing of copper | |
| 5. Separation of naphthalene from a mixture of naphthalene and sodium chloride. |
Give a reason why
Freezing of water is a reversible change while burning of a candle – an irreversible change.
Give a reason why rusting of iron is a chemical change but, the magnetization of iron is a physical change.
Select the chemical changes from the following list of changes
Drying of a fruit
Distinguish physical and chemical changes.
What is the difference between dissolution of sugar and burning of sugar ?
Give two examples for the following case:
Physical changes which are reversible
Which of the following is not a physical change?
