Question

Explain : excess pressure across the free surface of a liquid in the

following cases :

i) plain liquid surface.

ii) convex liquid surface.

iii) concave liquid surface.​

Answer 1

we know that the similar molecules of a liquid attract each other by a force of cojeasion and the force of coheasion and the force of the surface tension , tangentially to the liquid surface at rest . hence it can cocluded that excess pressure is less on a convex menisscus

Answer 2

It has no component perpendicular to the horizontal surface. As a result, there is no pressure difference between the liquid side and the vapour side. ... Thus, there is always an excess of pressure on the concave side of a curved liquid surface over the pressure on its convex side due to surface tension.