Question

The shape of drops and bubbles are spherical due to its

• A. Thrust on drop
• B. Surface tension
• C. Viscosity
• D. Residual pressure

Answer 1

The correct option is B

Surface tension

Explanation for correct option:

In the case of Option B:

1. The shape of drops and bubbles is spherical because the liquid surface tends to have the minimum area possible due to surface tension.
2. A sphere's surface has the smallest area.
3. Surface tension is the tendency of fluid surfaces to shrink into the minimum surface area possible.
4. Surface tension is the tension of the surface film of a liquid caused by the attraction of the particles in the surface layer by the bulk of the liquid, which tends to minimize surface area

Explanation for incorrect options:

1. The shape of bubbles and drops is spherical because of surface tension, not because of thrust, viscosity, and residual pressure.
2. Hence, Options A, C, and D are incorrect.

Hence, Option B is correct.