Consider the ions/molecule O _ 2 ^ + , O _ 2 , O _ 2 ^ - , O _ 2 … - Vidyadip

MCQ

Consider the ions/molecule

$O _{2}^{+}, O _{2}, O _{2}^{-}, O _{2}^{2-}$

For increasing bond order the correct option is ..... .

✓
$O _{2}^{2-}< O _{2}^{-}< O _{2}< O _{2}^{+}$
B
$O _{2}^{-}< O _{2}^{2-}< O _{2}< O _{2}^{+}$
C
$O _{2}^{-}< O _{2}^{2-}< O _{2}^{+}< O _{2}$
D
$O _{2}^{-}< O _{2}^{+}< O _{2}^{2-}< O _{2}$

✓

Answer

Correct option: A.

$O _{2}^{2-}< O _{2}^{-}< O _{2}< O _{2}^{+}$

a

ion/molecule	Number of $e^{-}$ BMO	Number of $e^{-}$ in ABMO	Bond order
$O _{2}{ }^{+}$	$10$	$5$	$2.5$
$O _{2}{ }$	$10$	$6$	$2$
$O _{2}{ }^{-}$	$10$	$7$	$1.5$
$O _{2}{ }^{-2}$	$10$	$8$	$1$

Bond order $O _{2}{ }^{2-}< O _{2}{ }^{-}< O _{2}< O _{2}{ }^{+}$

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