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Discussion

The absorption of ink by blotting paper involves

  • A.Viscosity of ink
  • B.Capillary action phenomenon
  • C.Diffusion of ink through the blotting
  • D.Siphon action

Answer: B

Blotting paper works by capillary action.

It is a mesh of loosely packed cellulose fibres with fine pores between them. Ink wets the fibres, so surface tension draws it into the pores, and the narrower the pore the further it is drawn.

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