A thin film of water covering the soil particles and held strongly by attractive forces are showing the phenomenon of
A
Run away
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B
Hygroscopy
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C
Gravity
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D
Capillary action
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Solution
The correct option is A Hygroscopy The hygroscopy is the phenomenon of attracting and holding water molecules from the surrounding. It usually takes place at normal or room temperature. The process like evaporation and boiling increases the intensity of the phenomena. It largely depends on relative humidity.
Gravitational force is the force which acts due to gravitation of earth.
Capillary is the ability of liqiud to maintain their flow due to strong cohesive force.