The compounds or ions which do not exist, are

Options

A. `OF_(4)`
B. `HFO_(4)`
C. `NCl_(5)`
D. `PBr_(6)^(-)`

Answer

ABCD

Explanation

`{:((A) OF_(4),=,"Oxygen does not have vacant d-orbitals"),((B) HFO_(4),=,"F is most EN element, which does not have +5 charge"),((C) NCl_(5),="Nitrogen atoms does not have vacant d-orbitals"),(D) PBr_(6),=,"Due to steric repulsion of Br atoms"):}`