Question

water wet glass while Mercury does not. why?
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Answer 1

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.

Answer 2

Forces of adhesion between the glass molecules and the cohesive forces with the molecules is much in water where adhesion wins while in mercury, molecular cohesive force wins therefore water wet glass while mercury does not. The adhesive force is greater than the cohesive force in water.

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