Question

For which one of the following is capillarity not the reason?

(a) Blotting of ink

(b) Rising of underground water

(c) Spread a water drop on a cotton cloth

(d) Rising of water from the roots of a plant to its foliage

Answer 1

(b) Capillary action, or capillarity, is a phenomenon where liquid spontaneously rises in a narrow space such as a thin tube, or in porous materials such as paper or in some non-porous materials such as liquified carbon fibre. This effect can cause liquids to flow against the force of gravity or the magnetic field induction. In blotting of ink, spread of water drop on a cotton cloth and the rising of water from the roots of a plant to its foliage.