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JAMB Physics 2009 Question 24

Question 24

Structure of Matter and Kinetic Theory

It is observed that water will wet a clean glass because the

  1. A.cohesion of water to glass is stronger than the cohesion of water molecules.
  2. B.adhesion of water molecules is weaker than the cohesion of water to glass.
  3. C.cohesion of water to glass is weaker than the cohesion of water molecules.
  4. D.adhesion of water molecules is stronger than the cohesion of water molecules.
Show the answer and explanation

Answer: D (adhesion of water molecules is stronger than the cohesion of water molecules.)

Explanation

Water wets glass because the adhesion between water and glass molecules is stronger than the cohesion between water molecules, so water spreads over the glass.