In which species `X-O` bond order is `1.5` and contains `ppi-dpi` bond`(s)`

Options

A. `IO_(2)F_(2)`
B. `HCOO^(-)`
C. `SO_(3)^(2-)`
D. `XeO_(2)F_(2)`

Answer

A

Explanation

`p_(pi)-p_(pi)` bond(s)=0
`p_(pi)-d_(pi)` bond(s)=1
bond order of (I-O)=1.5
`p_(pi)-p_(pi)` bond(s)=1
`p_(pi)-d_(pi)` bond(s)=0
bond order of (C-O)=1.5
`p_(pi)-p_(pi)` bond(s)=0
`p_(pi)-d_(pi)` bond(s)=1
bond order of (S-O)=1.33
`p_(pi)-p_(pi)` bond(s)=0
`p_(pi)-d_(pi)` bond(s)=2
bond order of (Xe-O)=2.0