Define cohesive and adhesive force.

F_c and F_A denote cohesive and adhesive forces on a liquid molecule near the surface of a solid. The surface of liquid is convex , if

Assertion : Cohesive and adhesive properties of water molecules form a continuous water column in the xylem. Reason : Magnitude of cohesive and adhesive force is very low.

Assertiion: Angle of contact does not depend upon the inclination of the solid in the liquid. Reason: Angle of contact depends on cohesive and adhesive force.

What are cohesive and adhesive forces ?

What are cohesive and adhesive forces ? Give examples.

Do cohesive and adhesive forces obey inverse square law?

Introduction OF Surface tension ||Cohesive and Adhesive force

Define force.

Surface tension arises from the cohesive force between the surface molecules. Interplay between cohesion and adhesion force make the surface inclined at acute or obtuse angle with the contacting solid surfaces. This causes a capillary rise (or fail) given as h=(2Tcostheta)/(rhogr) , where theta= angle of contact T= surface tension rho= density of the liquid, g= acceleration due to gravity and r= radius of the capillary tube. Q. In capillary action theta can be: