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प्रश्न
Give a geographical reason:
Air becomes saturated.
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उत्तर
When the water evaporates from the earth, it is released into the air. The air has a maximum ability to hold moisture in a certain quantity and at a particular temperature only. When this ability is reached and relative humidity reaches 100%, the air is considered to have reached its saturation point.
In other words, when the proportion of water vapour and the vapour holding capacity is equal, the air is said to be saturated.
संबंधित प्रश्न
Why does a desert cooler cool better on a hot dry day?
Why are volatile liquids such as alcohol and spirit stored in tightly closed bottles?
Why does evaporation cool a liquid ?
Which of the following are also considered to be the states of matter ?
- Plasma
- Platelets
- BEC
- BHC
During summer days, water kept in an earthen pot (pitcher) becomes cool because of the phenomenon of :
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 ?
Can you suggest a method to collect water from sea water?
Look at Fig. 1.3 and suggest in which of the vessels A,B, C or D the rate of evaporation will be the highest? Explain.
Comment on the following statements:
Rate of evaporation of an aqueous solution decreases with increase in humidity.
The process of evaporation is not a good technic to separate salt from seawater give a reason.
