Question

If the surface of a liquid is plane, then the angle of contact of the liquid with the walls of container is

• A. Acute angle
• B. Obtuse angle
• C. ${90}^o$
• D. $0^o$

Answer 1

The correct option is D $0^o$

Angle of contact with wall is angle of surface of liquid with the normal to the wall. Hence for a plane surface angle of contact is $0^0$.