The wettability of a surface by a liquid depends primarily on:

A angle of contact between the surface and the liquid

B viscosity

C surface tension

D density

The answer is A.

Solution

Wetting depends on the angle of contact: a liquid wets the surface when the angle is acute and does not wet it when the angle is obtuse.

Concept Angle of contact

3 questions from this chapter have appeared across 3 exam years.