Multiple choice general knowledge science & technology

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 contains numerous tiny pores that create capillary tubes. Ink is drawn into these pores by capillary action - the combined effect of adhesive forces between ink and paper fibers and cohesive forces within the liquid itself.

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