Home
Class 11
PHYSICS
Molecular forces exist between the molec...

Molecular forces exist between the molecules of a liquid in a container. The molecules on the surface have unequal force leading to a tension on the surface. If this is not compensated by a force, the equilibrium of the liquid will be a difficult task. This leads to an excess pressure on the surface. The nature of the meniscus can inform us of the direction of the excess pressure. The angle of contact of the liquid decided by the forces between the molecules, air and container can make the angle of contact.
In a meniscus of radius `r`, with excess pressure p in atmospheric pressure `p_(0)`, the force experienced is

A

`(p-p_0 ) pi r^2 `

B

` (p-p_0) 2 pi r^2 `

C

`p pi r^3 `

D

`p_0 2 pi r`

Text Solution

Verified by Experts

The correct Answer is:
C
Promotional Banner

Similar Questions

Explore conceptually related problems

Molecular forces exist between the molecules of a liquid in a container. The molecules on the surface have unequal force leading to a tension on the surface. If this is not compensated by a force, the equilibrium of the liquid will be a difficult task. This leads to an excess pressure on the surface. The nature of the meniscus can inform us of the direction of the excess pressure. The angle of contact of the liquid decided by the forces between the molecules, air and container can make the angle of contact. If the excess pressure in a soap bubble is p , the excess pressure in an air bubble is

Molecular forces exist between the molecules of a liquid in a container. The molecules on the surface have unequal force leading to a tension on the surface. If this is not compensated by a force, the equilibrium of the liquid will be a difficult task. This leads to an excess pressure on the surface. The nature of the meniscus can inform us of the direction of the excess pressure. The angle of contact of the liquid decided by the forces between the molecules, air and container can make the angle of contact. The direction of the excess pressure in the meniscus of a liquid of angle of contact 2pi//3 is

What type of forces do exist between the molecules of alkanes in liquid and solid states ?

Name two intermolecular forces that exist between HF molecules in liquid state.

Why there is an excess pressure on the concave side of a liquid surface?

The direction of the force exerted on a surface by a liquid at rest is

How should we take the reading of a liquid level, if the meniscus of the surface is convex .

If the angle of contact is less than 90^(@) the pressure just inside the surface of a meniscus

How should we take the reading of a liquid level, if the meniscus of the surface is concave

What is the effect of temperature on the surface tension of a liquid ?