In a glass capillary tube,the shape of the su | vedclass

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(C) The shape of the liquid surface (meniscus) in a capillary tube is determined by the angle of contact.The angle of contact is defined by the balanc

Vedclass · Accepted Answer

Only on the relative cohesive and adhesive forces between the atoms

Vedclass · Answer

(C) The shape of the liquid surface (meniscus) in a capillary tube is determined by the angle of contact.The angle of contact is defined by the balance of forces at the point of contact between the liquid,the solid (glass),and the gas (air).These forces are the cohesive force (force between liquid molecules) and the adhesive force (force between liquid molecules and glass molecules).Therefore,the shape of the surface depends on the relative magnitude of the cohesive and adhesive forces.If adhesive forces are stronger than cohesive forces,the liquid wets the glass (concave meniscus).If cohesive forces are stronger than adhesive forces,the liquid does not wet the glass (convex meniscus).Thus,the correct answer is $(c)$.

In a glass capillary tube,the shape of the surface of the liquid depends upon:

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