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प्रश्न
Evaporation takes place from the
पर्याय
surface of liquid
throughout the liquid
mid-portion of the liquid
bottom of liquid.
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उत्तर
surface of liquid
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संबंधित प्रश्न
Why does our palm feel cold when we put some acetone or petrol or perfume on it?
A liquid can change into vapour state at all temperatures.
What is evaporation?
Explain with an example to demonstrates that when a liquid evaporates, it takes heat from its surroundings.
Define the following term Freezing.
Why does all the water of the earth not get evaporated during hot summer days ?
What type of clothes should we wear in summer ? Why ?
The scientists now say that there are actually five states of matter A, B, C, D and E. The state A has a fixed volume but no fixed shape. The state B can be compressed very easily by applying pressure and state C has a fixed shape as well as a fixed volume. The state D is a mixture of free electrons and ions whereas state E is named after an Indian scientist and a famous physicist.
- Name the physical states (i) A (ii) B (iii) C (iv) D, and (v) E
- Name one substance belonging to state C which can directly change into vapours on heating. What is this process known as ?
- Name one substance which normally belongs to state B but whose solid form changes directly into gaseous state.
- Name the most common substance belonging to state A.
- Which state of matter makes the sun and other stars to glow ?
Why is the air in a region dry?
The rate of evaporation is more when the surface area is greater.
