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Question

The rise of a liquid in a capillary tube is due to


A

Diffusion

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B

Surface tension

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C

Atmospheric conditions

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D

Osmosis

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Solution

The correct option is B

Surface tension


The explanation for the correct option:

  1. Capillary rise is mainly caused due to cohesive forces in the liquid and adhesive forces acting between the liquid and the tube material.
  2. Surface tension is the property by which liquid surfaces act like a stretched elastic membrane.
  3. The rise of a liquid in a capillary tube is due to surface tension.

The explanation for incorrect option(s):

Option A: Diffusion

Diffusion is the movement of molecules from a region of higher concentration to a region of lower concentration down the concentration gradient.

Option C: Atmospheric conditions

The atmospheric conditions compose the aspect or quality of the atmosphere in relation to temperature, pressure, clouds, and precipitation.

Option D: Osmosis

Osmosis is a process by which the molecules of a solvent pass from a solution of low concentration to a solution of high concentration through a semi-permeable membrane.

Hence, option (B) is correct.


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