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  4. When the liquid does not wet the sides of a solid, then angle of contact is

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Q. When the liquid does not wet the sides of a solid, then angle of contact is

Rajasthan PETRajasthan PET 2003

Solution:

The liquids which do not wet the solid have obtuse angle of constant. For mercury and glass, the angle of contact is $ 135{}^\circ $ . The angle of contact for water and silver is $ 90{}^\circ $ .