"¿Sabes dónde están los pasaportes?"
Translation:Do you know where the passports are?
I put do you know where are the passports. Could this be right also?
No, the word order isn't exactly right. In a direct question, it's "Where are the passports?" But when you put that question at the end of another sentence, the to be verb and the subject invert: Do you know where the passports are?
Where is she? I know where she is. We don't say [I know where is she].
Where are the passports?, I fail to understand why the order of words should change: Do you know where are the passports? sounds just fine to.