Question

Name two functional groups that contain ionic charges?

Answer 1

a lot contain ionic charges
Like Azides and Nitrates.

Answer 2

Out of alkyl, carboxylate, protonated amines, amino group, and hydroxyl which two contain ionic charges?

Answer 3

Out of those, it would be carboxylate and protonated amines.
If you look up the structures, you'll notice that those 2 have a + or - added which indicates they're negatively or positively charged.