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प्रश्न
State which of the following 1 to 5 pertain to – A: Physical Change B: Chemical change :
- Sublimation.
- Fermentation.
- Liquefaction or condensation.
- Magnetization.
- Respiration.
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उत्तर
- Sublimation – A: Physical Change
- Fermentation – B: Chemical change
- Liquefaction or condensation – A: Physical Change
- Magnetization – A: Physical Change
- Respiration – B: Chemical change
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संबंधित प्रश्न
Name two reversible changes.
Give two examples of periodic changes.
What is a physical change ? Give two examples of physical changes.
Which of the following are chemical changes ?
- decaying of wood
- burning of wood
- sawing of wood
- hammering of nail into wood
Give reasons why – separation of mixtures e.g. iron from a mixture of iron and sulphur is a physical change, but heating a mixture of iron and sulphur is considered a chemical change.
Name the following:
The term involved in the change of state from – ‘water to ice’ – which is a physical change.
Name the following:
The final product of the physical change involved during the ‘melting of a piece of wax’.
Give a reason why
Freezing of water is a reversible change while burning of a candle – an irreversible change.
When a woolen yarn is knitted to get a sweater, the change can be classified as ____________.
Assertion: The explosion of fire cracker is a physical change.
Reason: A physical change is a reversible change.
