Surface tension arises from the cohesive force between the surface molecules, Interplay between cohesion and adhension forces make the surface inclined at acute or obtuse angle with the contactingsolid surfaces. This causes a capillary rise (or fall) given as,h=(2T cos theta)/( rho g r)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. In capillary rise

Surface tension arises from the cohesive force between the surface mol

1.	Surface tension arises from the cohesive force between the surface molecules, Interplay between cohesion and adhension forces make the surface inclined at acute or obtuse angle with the contactingsolid surfaces. This causes a capillary rise (or fall) given as,h=(2T cos theta)/( rho g r)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. In capillary rise
Answer» HEAT is evolved `U_( g R)` decrease `U_("TOTAL")` increase heat is absorbed Answer :A