What is the necessary force for a water drop | vedclass

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(A) For a liquid drop to stick to a solid surface like glass,the force of attraction between the molecules of the liquid and the molecules of the soli

Vedclass · Accepted Answer

Adhesive force

Vedclass · Answer

(A) For a liquid drop to stick to a solid surface like glass,the force of attraction between the molecules of the liquid and the molecules of the solid surface must be greater than the force of attraction between the molecules of the liquid itself.This force of attraction between different types of molecules is known as the adhesive force.Therefore,the adhesive force must be sufficient to overcome the cohesive force and the gravitational force acting on the drop.

Column-$I$	Column-$II$
$(a)$ Cohesive force	$(i)$ Useful for writing by chalk on blackboard.
$(b)$ Adhesive force	$(ii)$ Useful in soldering.
	$(iii)$ Useful for formation of spherical drops of liquid.

What is the necessary force for a water drop to stick to a glass surface?

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Force in Column-$I$ and its use in Column-$II$ are given. Match them appropriately.
Column-$I$ Column-$II$
$(a)$ Cohesive force $(i)$ Useful for writing by chalk on blackboard.
$(b)$ Adhesive force $(ii)$ Useful in soldering.
$(iii)$ Useful for formation of spherical drops of liquid.

Give reason why mercury does not wet glass.

Surface tension is due to

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