1.

The bond length the species `O_(2), O_(2)^(+) and O_(2)^(-)` are in the order ofA. `O_(2) gt O_(2) gtO_(2)^(-)`B. `O_(2)^(+) gt O_(2)^(-) gt O_(2)`C. `O_(2) gt O_(2)^(+) gtO_(2)^(-)`D. `O_(2)^(-) gt O_(2) gtO_(2)^(+)`

Answer» Correct Answer - a
As bond order increases bond length decreases, the bond order of species are
`= (Number of bonding electron - Number of antibonding electron)/(2)`
For `O_(2) = (10-6)/(2) = 2 , O_(2)^(+) = (10-5)/(2) = 2.5`
`O_(2)^(-) = (10-7)/(2) = 1.5`
So bond order `O_(2)^(+) gt O_(2) gt O_(2)^(-)` and length are
`O_(2)^(+) gt O_(2) gt O_(2)^(-)`


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