1.

The bond lengths in O_(2), O_(2)^(+) and O_(2)^(-) species follow the order :

Answer»

1. `O_(2)^(-)LT O_(2)lt O_(2)^(+)`
2. `O_(2)^(-)lt O_(2)^(+)lt O_(2)`
3. `O_(2)^(+)lt O_(2)lt O_(2)^(-)`
4. `O_(2)lt O_(2)^(+)lt O_(2)^(-)`

ANSWER :C


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