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JAMB Physics 2013 Question 23

Question 23

Structure of Matter and Kinetic Theory

The rise or fall of a liquid in a narrow tube is because of the

  1. A.viscosity of the liquid.
  2. B.surface tension of the liquid.
  3. C.friction between the walls of the tube and the liquid.
  4. D.osmotic pressure of the liquid.
Show the answer and explanation

Answer: B (surface tension of the liquid.)

Explanation

Capillary rise or fall is caused by surface tension together with the adhesion between the liquid and the tube.