Benefit: When the alchemist creates a bomb, he can choose to have it create a cloud of thick smoke when it detonates. The cloud functions as fog cloud, filling an area equal to twice the bomb’s splash radius for 1 round per level.
Does an alchemist’s inferno bomb, poison bomb, smoke bomb, or stink bomb cause bomb damage in addition to the special effect listed for those discoveries?
Yes. For example, a smoke bomb deals bomb damage and creates an area of smoke.
Advanced Player’s Guide. Copyright 2010, Paizo Publishing, LLC; Author: Jason Bulmahn.