Answer:
1. Jem is terrified of Mrs.Dubose
The author probably uses irony to show how Jem is pretending to be brave.
2. Not every church is rich
The author probably uses irony to show how naive Scout is to realize that black churches are poorer than white churches.
3. Calpurnia has a son and a private life
The author uses irony to show how Scout thinks that Calpurnia doesn't really have a life other then being their maid.
4. Mrs.Dubose actually admires the Finches, but shes so old and sick that she says things she doesn't mean.
The teacher uses irony to show how Scout thinks Mrs.Dubose dislikes them when she admires them.
I'll finish the rest later
Explanation: