Question

Rain drop or liquid drop are spherical in shape, especially when small, because
a) cohesive force between the molecules of water has spheres of influence
b) for a given volume, a spherical drop has the least surface energy
c) for a given volume, a spherical drop has the maximum energy
d) the pressure inside the drop is many times the atmospheric pressure outside.​

Answer 1

The correct answer is OPTION a) Cohesive force between the molecules of water has spheres of influence.

EXPLANATION:

• For water, the cohesive forces between the molecules are higher than the adhesive forces between water and air.
• Liquid drops take on a spherical form due to the surface tension of water, and surface tension is higher in small drops than in larger ones.
• The surface area of spheres is less than that of other forms.
• As a result, a raindrop or liquid drop takes on a spherical form to minimize contact with the surface.