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Capillary Action

In a capillar...

Question

In a capillary tube, fall of liquid is possible when angle of contact is

A

Acute angle

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B

Right angle

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C

Obtuse angle

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D

None of these

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Solution

The correct option is C Obtuse angle
If angle of contact is acute, liquid rises in a capillary tube whereas if angle of contact is obtuse, liquid falls in a capillary tube.
Therefore, fall of liquid is possible when angle of contact is obtuse.

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