Multiple choice general knowledge

The absorption of ink by blotting paper involves

  1. viscosity of ink

  2. capillary action phenomenon

  3. diffusion of ink through the blotting

  4. siphon action
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Blotting paper absorbs ink through capillary action - the movement of liquid through narrow spaces due to adhesive and cohesive forces. The paper's porous structure contains many tiny channels that draw ink upward against gravity. Viscosity resists flow, diffusion is slow random motion, and siphon action requires gravity-driven flow through a tube.

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