1.

The bond order in `O_2^-`ion isA. 2B. 1C. 2.5D. 1.5

Answer» Correct Answer - D
The electronic configuration of `O_(2)^(-)`
`O_2^(-) to (sigma1s)^(2) (sigma^(**)1s)^(2)(sigma2s)^(2)(sigma^(**)2s)^(2)(sigma2p_(z))^2`
`(pi2p_(x))^(2)(pi 2p_(y))^(2)(pi^(**)2p_(x))^(2)(pi^(**)2p_(y))^1`
Bond order =1/2 `[N_(b)-N_a]`
=1/2 [10-7]=3/2=1.5


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