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

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

Punjab PMETPunjab PMET 2008Mechanical Properties of Fluids

Solution:

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