Which of the following species is-are diamagneticI O 2- II O 2I O 2- II O 22A- O 2- O 2-B- O 2 and O 22-C- O 22- onlyD- O 2- O 2-2

O_2 (σ _1s)^2(σ^* _1s)^2(σ _2s)^2(σ^* _2s)^2(σ _2pz)^2 nbsp;(π_2px)^2=(π_2py)^2 nbsp;(π^*_2px)^1=(π^*_2py)^1(σ ^*_2pz)^0 O_2^+ (σ _1s)^2(σ^* _1s)^2(σ _2s)^2 ...

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Byju's Answer

Standard XII

Chemistry

Magnetic Nature

Which of the ...

Question

Which of the following species is/are diamagnetic
(I) $O_{2}^{+}$ (II) $O_{2}$
(I) $O_{2}^{-}$ (II) $O_{2}^{2 -}$

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

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O_{2}

and

O_{2}^{2 -}

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O_{2}^{2 -}

only

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

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Solution

The correct option is C $O_{2}^{2 -}$ only
$O_{2}$
$(σ_{1 s})^{2} (σ_{1 s}^{})^{2} (σ_{2 s})^{2} (σ_{2 s}^{})^{2} (σ_{2 p z})^{2} (π_{2 p x})^{2} = (π_{2 p y})^{2} (π_{2 p x}^{})^{1} = (π_{2 p y}^{})^{1} (σ_{2 p z}^{})^{0}$
$O_{2}^{+}$
$(σ_{1 s})^{2} (σ_{1 s}^{})^{2} (σ_{2 s})^{2} (σ_{2 s}^{})^{2} (σ_{2 p z})^{2} (π_{2 p x})^{2} = (π_{2 p y})^{2} (π_{2 p x}^{})^{1} = (π_{2 p y}^{})^{0} (σ_{2 p z}^{})^{0}$
$O_{2}^{-}$
$(σ_{1 s})^{2} (σ_{1 s}^{})^{2} (σ_{2 s})^{2} (σ_{2 s}^{})^{2} (σ_{2 p z})^{2} (π_{2 p x})^{2} = (π_{2 p y})^{2} (π_{2 p x}^{})^{2} = (π_{2 p y}^{})^{1} (σ_{2 p z}^{})^{0}$
$O_{2}^{- 2}$
$(σ_{1 s})^{2} (σ_{1 s}^{})^{2} (σ_{2 s})^{2} (σ_{2 s}^{})^{2} (σ_{2 p z})^{2} (π_{2 p x})^{2} = (π_{2 p y})^{2} (π_{2 p x}^{})^{2} = (π_{2 p y}^{})^{2} (σ_{2 p z}^{})^{0}$

$\begin{matrix} Unpaired e^{-} O_{2} = & 2 O_{2}^{+} = & 1 O_{2}^{-} = & 1 O_{2}^{2} = & 0 \end{matrix}$
The species having no unpaired electron is diamagnetic.
So, only $O_{2}^{2 -}$ is diamagnetic.

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Similar questions

Q. What is the stability order of the following species?

O_{2}^{2 +}

O_{2}^{+}

O_{2}

O_{2}^{-}

O_{2}^{2 -}

Q. Which of the following orders is correct for the bond dissociation energy of

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

and

O_{2}^{2 -}

Q. Decreasing order of stability of

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

and

O_{2}^{2 -}

is :-

Q. Arrange the following molecules/species in the order of their increasing bond orders.
(I)

O_{2}

(II)

{O_{2}}^{-}

(III)

O_{2}^{2 -}

(IV)

O_{2}

Q. Bond orders of

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

and

O_{2}^{2 +}

in increasing order are :

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Which of the following species is/are diamagnetic (I) O+2 (II) O2 (I) O−2 (II) O2−2

Which of the following species is/are diamagnetic
(I) $O_{2}^{+}$ (II) $O_{2}$
(I) $O_{2}^{-}$ (II) $O_{2}^{2 -}$