Which of the following represents the arrangement in increasing order of bond order and bond dissociation energy ?

Options

A. `O_(2)^(+)lt O_(2)^(2-)lt O_(2)^(-)lt O_(2)`
B. `O_(2)^(2-)lt O_(2)^(-)lt O_(2)lt O_(2)^(+)`
C. `O_(2)lt O_(2)^(+)lt O_(2)^(2-)lt O_(2)^(-)`
D. `O_(2)^(2-)lt O_(2)^(-)lt O_(2)^(+)lt O_(2)`

Answer

B

Explanation

Electronic configuration of `O_(2)` :
`KK(sigma 2s)^(2)(sigma^(**)2s)^(2)(sigma 2p_(z))^(2)(pi 2p_(x))^(2)(pi 2p_(y))^(2)(pi^(**)2p_(x))^(1)(pi^(**)2p_(y))^(1)`
`B.O. =(8-4)/(2)=2`
Bond order : `O_(2)^(+)=2.5 : O_(2)^(-): 1.5 :`
`O_(2)^(2-)=1.0`
Bond order `O_(2)^(2-)lt O_(2)^(-)lt O_(2)lt O_(2)^(+)`
Larger the bond order, larger is the bond dissociation energy.