Question

What will be the shape of liquid meniscus for obtuse angle of contact?

Answer 1

Explanation:

Angle of Contact in Physics | Definition – Surface Tension

Angle of Contact in Physics | Definition – Surface TensionThe angle of contact increases and becomes obtuse. Water does not rise in it. Rather it falls in the tube by virtue of obtuse angle of contact. If θ is acute angle, i.e. θ<9o°, then liquid meniscus will be concave upwards.

Answer 2

The shape of liquid meniscus for obtuse angle of contact will be convex.

• When the shape of the liquid meniscus forms an obtuse angle then we can say that the cohesive forces between the particles of liquid is greater than its adhesive force with the container. In simple words the attractive forces between particles of the liquid is greater.
• Due to these cohesive forces the liquid meniscus forms a convex shape.