Question

Which of the following relationships is true?

• A. Bond dissociations energy of $O_{2}$and $O_{2}^{-}$are same.
• B. Bond dissociations energy of $O_{2}^{+}$is higher than $O_{2}$
• C. Bond dissociation energy of $O_{2}^{-}$and $O_{2}^{2 -}$are same.
• D. Bond dissociation energy of $O_{2}^{2 -}$is higher than $O_{2}^{-}$

Answer 1

Answer: (B)

Bond dissociations energy of $O_{2}^{+}$is higher than $O_{2}$

Answer 2

: M.O. configuration of $O_{2}^{+}$

$(\sigma 1s^{2})(\sigma*1s^{2})(\sigma 2s^{2})(\sigma*2s^{2})(\sigma 2p_{x}^{2} = \pi 2p_{y}^{2})(\pi*2p_{x}^{1})B.O. = \frac{10 - 5}{2} = 2.5$

B.O. of $O_{2}$=2 $\left\lbrack \begin{aligned} & O_{2}^{+} > O_{2} > O_{2}^{-} > O_{2}^{2 -} \\ & 2.521.51 \end{aligned} \right\rbrack$