Chemical Engineering - Fluid Mechanics - Discussion

Why not cohesion?

It is greater than adhesion.

Actually, both answer (surface tension, cohesive) are correct because surface tension is caused by cohesive force b/w surface molecules.

Actually both answers, surface tension & cohesive are correct but in the question they asked fluid property not a force that's why the answer is surface tension.

When liquid water is confined in a tube, its surface (meniscus) has a concave shape because water wets the surface and creeps up the side. Mercury does not wet glass - the cohesive forces within the drops are stronger than the adhesive forces between the drops and glass.

Surface tension and viscosity are properties of fluid.

So last two option are eliminated and no question of viscosity because viscosity is resistance to the relative motion of fluid layers so answer is surface tension.

Hello, guys.

My answer is cohesion because of attraction forces acting between same molecule.

Mercury in a glass flask is a good example of the effects of the ratio between cohesive and adhesive forces.

Because of its high cohesion and low adhesion to the glass, mercury does not spread out to cover the top of the flask, and if enough is placed in the flask to cover the bottom, it exhibits a strongly convex meniscus, whereas the meniscus of water is concave.

Mercury will not wet the glass, unlike water and many other liquids, and if the glass is tipped, it will 'roll' around inside.

Surface tension is a result of cohesive forces. So, cohesion may be the suitable answer.

I think cohesion is the correct answer.

Yes, surface tension includes fluids cohesive forces, Cohesion is the property in which liquid molecules attract each other and remain a continuous mass. So true answer is surface tension.