The correct answer is option 1: Vapor formation above the liquid surface.

Surface tension is the force that causes the molecules on the surface of a liquid to be attracted to each other, creating a "skin-like" surface. It is responsible for several phenomena, but vapor formation above the liquid surface is not one of them.

Option 2, the convex shape of a liquid meniscus, is the result of surface tension. When a liquid is placed in a container with narrow walls, the attractive forces between the liquid molecules create a curved shape.

Option 3, the rising of a liquid in a capillary, is also a result of surface tension. Capillary action occurs when the adhesive forces between the liquid and the walls of a narrow tube overcome the cohesive forces within the liquid, causing it to rise.

Option 4, the spherical shape of a droplet of mercury fallen on the floor, is another outcome of surface tension. The cohesive forces between the mercury molecules pull them closely together, resulting in a spherical shape.

In conclusion, all options except option 1 are effects of surface tension. Vapor formation above the liquid surface is not caused by surface tension but is instead a result of the liquid reaching its boiling point and energy being supplied to overcome the intermolecular forces