Passive Voice of “Has someone made all the necessary arrangements?”

Have all the necessary arrangements been made by someone?

Has all the necessary arrangements been made by someone?

Have the necessary arrangements been all made by someone?

All the necessary arrangements have been made by one.

The correct passive voice is: "Have all the necessary arrangements been made by someone?"

In passive voice, the object of an active sentence becomes the subject.

The verb "has" changes to "have" to agree with "arrangements" (plural), and "been made" maintains the perfect tense.