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NEET2020PhysicsMechanical Properties of FluidsActual

A liquid does not wet the solid surface if angle of contact is:

Options

  1. Aequal to 45 °
  2. Bequal to 60 °
  3. Cgreater than 90 °
  4. Dzero

Correct answer

C. greater than 90 °

Step-by-step solution

A liquid does not wet the solid surface if the angle of contact is obtuse ie, greater than 90 ° . In this case cohesive forces will be greater than adhesive forces and so, the liquid does not wet the surface of solid.

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