Answer:
Interrogative: Was he an angel of peace?
Step-by-step explanation:
The sentence "he was an angel of peace" is in the affirmative form. The subject is preceding the verb, that is, it is before the verb. The verb is "was", the past form of the verb "to be".
When changing the sentence into the interrogative form, we should simply invert the positions of the subject and the verb. "To be" is a different verb, and it does not require an auxiliary like other verbs do. Thus:
Aff.: He was an angel of peace.
Int.: Was he an angel of peace?