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प्रश्न
State three differences between evaporation and boiling
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उत्तर
| BOILING | EVAPORATION | |
|---|---|---|
| Definition of these two terms | Boiling is vaporisation of liquid into gas due to continuous heating. Most of the time it is not a natural process. | Evaporation on the other hand is a natural process and it is similar to boiling , but the liquid form changes into gaseous form when there is a increase in either temperature or pressure or both. |
| Occurrance | Large mass | only on surface |
| Amount temperature involved | Boiling happens when the temperature reaches to the boiling point. | In Evaporation the temperature does not need to reach to boiling point |
| Bubble Formation | Bubble formation is visible | Bubbles do not form in evaporation |
| Energy | Usually external source of energy is needed for boiling to happen. | Most of the time energy for evaporation is supplied by the atmosphere or surrounding. |
| Length of the process | Rapid Process | Slow process compared to boiling |
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संबंधित प्रश्न
Classify the following as chemical or physical change:
Cutting of trees
Changes in which only ______ properties of a substance change are called physical changes.
Fill in the blank
change in which the substance can be brought back to its original state is called a ............... change.
Fill in the blank.
Growing of a seedling into a plant is _______ change.
State whether the following is physical or chemical changes.
burning of sugar —
True or false
Change of seasons is a non-periodic change.
Classify the following changes as physical or chemical.
Fill in the blank.
There is no change in the _____________of the substance during a physical change.
What will you take into account while identifying the following?
A chemical change in a substance.
Classify the following changes as physical and chemical changes
A rough piece of wood is sanded and polished resulting in change in texture, Rusting of a iron nail, Painting the grill, Bending a paper clip, Pounding silver into thin plate, Rolling the chappathi dough into thin wire, Occurrence of day and night, eruption of volcano, burning of matchstick, dosa from the batter, blinking of eyelids, occurrence of a thunderstorm, rotation of the earth, formation of eclipses.
| Sr. No. | Physical changes | Chemical changes |
| 1. | ||
| 2. |
