Question

Which of the following pairs of species have the same bond
order ? [2017]
(a) O₂, NO⁺ (b) CN⁻, CO
(c) N₂ ,O₂⁻ (d) CO, NO

Answer 1

Answer:

Options C is correct

Explanation:

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Answer 2

 $\bold{CN^{-}\,and\,CO}$

pairs of species have the same bond

Correct answer -(b)

Step by step explanation:

The molecules have same number of electrons have same bond order.

The number of electrons in the each given option is as follows.

(a)

$\bold{O_{2}\,and\,NO^{+}}$

Number of electrons in $O_{2}$ = 8 +8  = 16

Number of electrons in $NO^{+}$ = 7 + 8 -1 = 14

(b)

$\bold{CN^{-}\,and\,CO}$

Number of electrons in $CN^{-}$ = 6 + 7 + 1 = 14

Number of electrons in CO = 6 + 8 = 14

(c)

$\bold{N_{2}\,and\,O_{2}^{-}}$

Number of electrons in $N_{2}$ = 7 + 7 =14

Number of electrons in $O_{2}^{-}$ = 8 + 8 +1 = 17

(d)

Number of electrons in CO = 6 + 8 =14

Number of electrons in NO = 7 + 8 = 15

Therefore, $\bold{CN^{-}\,and\,CO}$ have same number of electrons.

Hence, correct option is (b).

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