Question

Active voice : "Was it a haunted room?"
Change it to passive voice

Answer 1

A passive voice is the one which focuses on an object or person that is taking action or experiencing it. However, on converting the subject will change into the person, it can be a name or the possessive adjective.

Answer 2

Answer:

I think the answer is,

           "Was the room haunted"

                 Hope it helps you^_^