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प्रश्न
Can you suggest a method to collect water from sea water?
उत्तर
Evaporation
APPEARS IN
संबंधित प्रश्न
A liquid can change into vapour state at all temperatures.
Give two applications of evaporation.
Explain why in hot summer days water remains cool in earthen pots.
What type of clothes should we wear in summer ? Why ?
How will you demonstrate that water vapour is present in air ?
Why does evaporation cool a liquid ?
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 ?
How is humidity measured?
How does the water kept in an earthen pot remain cool?
Comment on the following statements:
Rate of evaporation of an aqueous solution decreases with increase in humidity.
