Class 11PhysicsFluid Mechanics and Surface TensionBasic of Surface tenstion , Adhesive force and Cohesive force
EasyGive reason why mercury does not wet glass.
(N/A) The cohesive forces among the molecules of mercury are much stronger than the adhesive forces between the molecules of mercury and glass.
Because the cohesive force dominates,the mercury atoms prefer to stay together rather than spreading out on the glass surface.
Consequently,mercury does not stick to or wet the glass surface.
Because the cohesive force dominates,the mercury atoms prefer to stay together rather than spreading out on the glass surface.
Consequently,mercury does not stick to or wet the 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.
| 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. |
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