Q. The absorption of ink by blotting paper involves

A
capillary action phenomenon
B
viscosity of ink
C
siphon action
D
diffusion of ink through the blotting
Solution:

Adhesion of water to the walls of a vessel will cause an upward force on the liquid at the edges and result in a meniscus which turns upward. The surface tension acts to hold the surface intact. Capillary action occurs when the adhesion to the walls is stronger than the cohesive forces between the liquid molecules.

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