17. _______ in humidity increases rate of evaporation.

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Solution

Decrease in humidity increases rate of evaporation.
Humidity is defined as the amount of moisture content present in the air.
The rate of evaporation of a liquid is inversely proportional to the amount of humidity present in the atmosphere.
$R a t e o f e v a p o r a t i o n \propto \frac{1}{H u m i d i t y}$
This means that the more is humidity in the atmosphere, the lesser will be the rate of evaporation.
Thus, decrease in humidity increases rate of evaporation.

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Give a reason for the following statement.

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Assertion (A): Wet clothes dry faster on a windy day.

Reason (R): Rate of evaporation is proportional to humidity.

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