Bond length order is

Options

A. `O_(2)lt O_(3)lt O_(2)^(2-)`
B. `O_(2)lt O_(2)^(2-)lt O_(3)`
C. `O_(2)^(2-)lt O_(3)lt O_(2)`
D. `O_(2)=O_(2)^(2-)gt O_(3)`

Answer

A

Explanation

Ozone molecule is V-shaped with O - O bond length `1.278 Å`.

The bond length is intermediate between that for a single bond (1.48 Å as in `H_(2)O_(2)`) and for a double bond (1.21 Å as in `O_(2)`).
Also, bond order `prop =(1)/("bond length")`
Hence, `O_(2)lt O_(2)^(2-)`.