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Factors Affecting Evaporation

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Question

State the appropriate scientific reasons for the following statement:
The rate of evaporation decreases with increase in humidity.

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Solution

When humidity is high, the air is already saturated with water vapour, which means it has a lot of water vapour. Therefore, it will not take more water vapour easily. Hence, rate of evaporation decreases.

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Decrease in humidity at a given temperature increases the rate of evaporation.

Q. Question 26
Comment on the following statements:
(a) Evaporation produces cooling.
(b) Rate of evaporation of an aqueous solution decreases with increase in humidity.
(c) Sponge though compressible is a solid.

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(I) Increase in relative humidity decreases the density of air
(II) Increase in relative humidity decreases the rate of evaporation of water
(III) Increase in relative humidity decreases the velocity of sound
(IV) Increase in relative humidity increases the velocity of sound

Explain why rate of evaporation of an aqueous solution decreases with increase in humidity ?

Q. As the level of humidity decreases, the rate of evaporation __________.

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Factors Affecting Evaporation

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