Question

When an mercury is in contact with glass, then the surface of mercury is
a) Concave
b) convex
c) plane
d) horizontal​

Answer 1

Answer:

b) convex

Explanation:

Mercury does not wet glass - the cohesive forces within the drops are stronger than the adhesive forces between the drops and glass. When liquid mercury is confined in a tube, its surface (meniscus) has a convex shape because the cohesive forces in liquid mercury tend to draw it into a drop.