Is the phrasal verb breakaway separable?. I mean can all the phrasal verbs be separated by a noun or pronoun?
If you are referring to "break away", then yes it is separable in some cases.
The rocks began to break away from the cliff edge. [not separated]
I like to break crumbs away from the cake, and eat them. [separated]
That teenager needs to be broken away from his parents so that he can mature independently.
The social worker decided to break the child away from his bad influences.
>I mean can all the phrasal verbs be separated by a noun or pronoun?
If you do mean this, then no, not all phrasal verbs can separated - only those which are "separable". "Break away" is a separable phrasal verb.