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Evaporation

Water in an e...

Question

Water in an earthen pitcher gets cooled due to

A

slower rate of evaporation

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B

faster rate of evaporation

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C

no evaporation at all

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D

some unknown reason

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Solution

The correct option is C faster rate of evaporation
Earthen pots are used in summer. The pot has several pores through which water rinses out to the outer surface of the earthen pot and evaporates. In this process it takes away heat from the water inside the pitcher. As a result, the water inside gets cooled.

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Similar questions

Q. Assertion :Water kept in earthen pots gets cooled in summer. Reason: Evaporation causes cooling.

Q. During summer days, water kept in an earthen pot (pitcher) becomes cool because of the phenomenon of :
(a) diffusion
(b) transpiration
(c) osmosis
(d) evaporation

Q. Assertion :Water kept in an earthen pot becomes cooler during summers. Reason: Evaporates taking latent heat and removal of latent heat results on cooling. Earthen pots have small pores through which the water seeps and as evaporation leads to cooling of the substance.

Q. An earthen pitcher loses

1 gm

of water per minute due to evaporation. If the water equivalent of pitcher is

0.5 kg

and pitcher contains

9.5 kg

of water. Calculate the time required for the water in pitcher to cool to

28^{\circ} C

from original temperature of

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. Neglect radiation effects. Latent heat of vaporization in this range of temperature is

580 Cal/gm

and specific heat of water is

1 {Cal/gm}^{\circ} C

.

Q. An India pitcher has 10 kg of water. Water cools by means of evaporation through the pores. Find the time in which the temperature of water falls by 5

^{o}

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^{- 1}

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