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WBCS Preliminary Examination 2020 — General Studies · Question 110 of 200

Q110
General SciencePhysics
The absorption of ink by blotting paper involves
  1. a.viscosity of ink
  2. b.capillary action
  3. c.diffusion of ink
  4. d.siphon action

Answer: (B) capillary action

The fine pores of blotting paper draw up ink through capillary action, the same phenomenon that pulls water up in narrow tubes.

Q109 Whole paperQ111