Coatings used on raincoats are waterproof because

Three surfaces of liquid are shown here. Find the correct statements.

The spiders and insects move and run about on the surface of water without sinking because

If for a liquid in a glass vessel,the force of cohesion $(F_C)$ is twice the force of adhesion $(F_A)$,then which of the following statements are correct?
$(A)$ The meniscus will be convex.
$(B)$ The liquid will wet the glass.
$(C)$ The angle of contact will be obtuse.
$(D)$ There will be capillary descent in a glass capillary dipped in the liquid.
Correct option$(s)$ is/are:

When drops of mercury are placed on a clean surface of glass,they merge and become a single drop. Explain.

Why does the surface of a liquid have a tendency to minimize its area?