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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
Classify the following as chemical or physical change:
Burning of paper and wood
Tick the most appropriate answer.
3. Physical changes are
- permanent.
- periodic,
- temporary
- irreversible.
State four differences between physical and chemical changes.
State whether the following is physical or chemical changes.
lightning —
Tick the most appropriate answer.
Rising and setting of the sun at a given place is a
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
Boiling of milk.
Give the reason why the following is considered as chemical changes.
A bright light is seen evolved when a strip of magnesium is heated.
Give the reason why the following is considered as chemical changes.
An iron nail kept open in the atmosphere rusts.
In a solution of salt in water, water is the solute
