GENERAL KNOWLEDGE

GK

CHEMISTRY

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
What property of water allows insects to walk upon it?
A
adhesion
B
surface tension
C
high heat capacity
D
None of the above
Explanation: 

Detailed explanation-1: -Water striders are able to walk on top of water due to a combination of several factors. Water striders use the high surface tension of water and long, hydrophobic legs to help them stay above water. Water striders use this surface tension to their advantage through their highly adapted legs and distributed weight.

Detailed explanation-2: -Insects have a surface tension that is less than the water around them. This means that the water molecules are attracted to the insect’s surface. The hydrogen bonds hold the water molecules together and push them up against the insect’s surface. This creates a force that keeps the insect on the surface of the water.

Detailed explanation-3: -Surface tension in water owes to the fact that water molecules attract one another, as each molecule forms a bond with the ones in its vicinity.

Detailed explanation-4: -When tiny water-walking insects or spiders press against the water, their feet bend or deform the surface, but don’t break through it. The surface then bounces back, propelling the tiny water-walker forward. Surface tension makes this type of locomotion possible.

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