Give a reason why a finely divided substance is more effective as an adsorbent.

(N/A) Adsorption is a surface phenomenon.
Therefore,the extent of adsorption is directly proportional to the surface area of the adsorbent.
$A$ finely divided substance possesses a much larger surface area per unit mass compared to a bulk substance.
Since both physisorption and chemisorption depend on the available surface area,a finely divided substance provides more active sites for the adsorbate molecules to get adsorbed,making it a more effective adsorbent.