A catalyst in a finely divided form is most effective because:
Less surface area is available
More active centres are formed
More energy stored in catalyst
None of these
Finely divided means more surface area and more surface area, more active sites.
The extent of adsorption increases with the increase of the surface area of the adsorbent. These finely divided metals and porous substances having large surface areas are good adsorbents.
So, Option 2 is correct.