Question 23

Which of the following have identical bond order?

(a) $C N^{-}$

(b) $N O^{+}$

(c) $O_{2}^{-}$

(d) $O_{2}^{2 -}$

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Solution

Answers:

(a) $C N^{-}$

(b) $N O^{+}$

$C N^{-}$ (number of electrons = 6 + 7 + 1 =14)

$N O^{+}$ (number of electrons = 7 + 8 - 1 = 14)

$O_{2}^{-}$ (number of electrons = 8 + 8 + 1 = 17)

$O_{2}^{2 -}$ (number of electrons = 8 + 8 + 2 = 18)

Thus, $C N^{-}$ and $N O^{+}$ because of the presence of same number of electrons, have same bond border.

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Question 20

Which of the following options represents the correct bond order?

(a) $O_{2}^{-} > O_{2} > O_{2}^{+}$

(b) $O_{2}^{-} < O_{2} < O_{2}^{+}$

(d) $O_{2}^{-} < O_{2} > O_{2}^{+}$

Among the following the total no. of species which are paramagnetic

$O_{2}, S_{2}, C N^{-}, N O^{+}, O_{2}^{2 +}, O_{2}^{2 -}, B_{2}, N_{2}^{2 -}, O_{2}^{+}, N O, N O_{2}, N_{2} O$ ___

O_{2}^{+}, O_{2}, O_{2}^{-}

O_{2}^{2 -}

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