1.

PBr_(5) in solid state exists as :

Answer»

`[PBr_(6)]^(-)[PBr_(4)]^(+)`
`[PBr_(4)]^(+)[Br]^(-)`
`[PBr_(6)]^(+)[Br_(4)]^(-)`
`(PBr_(5))_(2).`

Answer :B


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