Q. A liquid does not wet the sides of a solid, if the angle of contact is
A) Obtuse
B) $90{^\circ}$
C) acute
D) Zero
Explanation
(a) The liquid which do not wet the solid have obtuse angle of contact. For mercury and glass, the angle of contact is $135{^\circ}$.
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.