Question

A manifestation of surface tension is:

• A. Spherical shape of liquid drops
• B. Downward movement of water in soils
• C. Fall of liquid in a capillary tube
• D. All of these

Hint:

Surface tension explains many everyday phenomena such as:
Shape of liquid drops
Capillary rise or fall
Movement of water through fine pores

Answer 1

The Correct Option is D

Step 1: Spherical shape of liquid drops Due to surface tension, a liquid tries to minimize its surface area. For a given volume, a sphere has the minimum surface area, hence liquid drops tend to become spherical.
Step 2: Downward movement of water in soils Surface tension along with adhesion between water molecules and soil particles causes capillary action, which plays a role in the movement of water through soil pores.
Step 3: Fall of liquid in a capillary tube In a capillary tube, surface tension and cohesive forces cause the liquid to rise or fall depending on the nature of the liquid and the tube material.
Step 4: Since all the given phenomena are consequences of surface tension, the correct answer is All of these.