Question

What are some examples of surface tension?
A) Small insect walking on water
B) Shape of water droplets
C) A small object floating on surface of water
D) All of the above

Answer 1

Hint: We have to remember that the formation of bubbles is a most common example of surface tension as the molecules of liquids are so strong and hold each other tightly.

Complete step by step answer:
We need to know that the surface tension is the property of a surface of liquid that allows it to hold any outside force on it. The forces that are present in liquid molecules are cohesive forces which are responsible for surface tension. The liquid molecules which are present on the surface of the container do not have neighboring molecules due to which strong cohesive forces are there at that area. Due to the surface tension small bodies float on the surface of water.
Option A) This option can be an example of surface tension as the weight of a small insect is not enough as it gets into the water.
Option B) This option can be an example of surface tension as the shape of the water droplet is due to the phenomenon of surface tension; water droplets tend to pull themselves in spherical shape due to the cohesive forces holding the water molecules.
Option C) this option is an example of surface tension as explained above small objects float on the surface of water and if they are denser than water they will sink in it breaking the agitation of water molecules.
Option D) this is a correct option as all the options given are examples of surface tension.

Hence, the correct option is, ‘Option D’.

Note: We have to know that the surface tension in water is due to the fact that water molecules attract each other and form a bond with its neighboring water molecule. And at the surface there are very few water molecules thus cohesive forces are stronger.