False. Check the language on each application for the schools you're applying to. Some require disclosure regardless of whether or not it was expunged
Not false. Sure, some applications purport to require disclosure of expunged information. However, once that information is expunged, a) as a practical matter, it no longer exists in your accessible student file, and b) whatever remains regarding the proceedings are no longer accessible without your permission, a warrant, or a direct request from a federal law enforcement agency. Check the particular undergraduate school for its policy regarding this matter. The ombudsman will guide you through this process and inform you on how to handle those ethical dilemmas. Let me just qualify my previous post, and add that it doesn't "necessarily" need to be disclosed. While blueskies is most likely speculating, I am speaking from direct experience on the matter. Speak with your university ombudsman.