Question

what is mean by imbibition?
give two examples for it.
what is colloids?

Answer 1

Imbibition is the phenomenon by which plant cell absorbs water by surface attraction. 
Examples: dry seeds absorb water when kept in water for long time; before germination, seeds swell by absorbing water

Colloids are solutions with the particle size between 1 to 1000nm

Answer 2

Imbibition is defined as the displacement of one fluid by another immiscible fluid. ... A classification of imbibition processes was given by Payatakes and Dias dry seeds absorb water when kept in water for long time; before germination, seeds swell by absorbing waterA mixture in which one substance is divided into minute particles (called colloidalparticles) and dispersed throughout a second substance.