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Question

The most important force which pulls water up in tall trees is

A
Imbibition force
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B
Osmotic force
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C
Cohesive force
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D
Electromagnetic force
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Solution

The correct option is C Cohesive force
Cohesive force is the force acting between molecules of water. It is very high in case of water. Hence, water remains liquid till very high temperature and does not vaporise easily. During ascent of sap, cohesive force is important for formation of a continuous column of water in the xylem elements that moves up by transpiration pull.

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