Absorption of ink by blotting paper involves

Absorption of ink by blotting paper involves the capillary reaction phenomenon; option [B]. Capillary action occurs due to the cohesive and adhesive forces between the liquid molecules and the fibers of the paper. This interaction causes the ink to be drawn upward through the small pores in the paper, facilitating its absorption. Capillary action is crucial in processes like ink absorption in blotting paper, where it efficiently pulls the ink into the paper fibers. Viscosity of the ink refers to its resistance to flow and is not directly related to the adsorption process. Diffusion of ink through blotting involves the movement of ink molecules through the paper, which is not the primary mechanism in ink absorption by blotting paper. Siphon action requires a continuous flow of liquid, which is not applicable to the absorption of ink by blotting paper. Therefore, the correct option is [B] Capillary Reaction phenomenon.