CameraIcon

SearchIcon

MyQuestionIcon

1

You visited us 1 times! Enjoying our articles? Unlock Full Access!

Bond Order and Enthalpy

The correct o...

Question

The correct order of bond lengths is:

A

O_{2}^{+} > O_{2}^{2 -} > O_{2}^{-}

No worries! We‘ve got your back. Try BYJU‘S free classes today!

B

O_{2}^{-} > O_{2}^{+} > O_{2}^{2 -}

No worries! We‘ve got your back. Try BYJU‘S free classes today!

C

O_{2}^{2 -} > O_{2}^{-} > O_{2}^{+}

Right on! Give the BNAT exam to get a 100% scholarship for BYJUS courses

D

O_{2}^{+} > O_{2}^{-} > O_{2}^{2 -}

No worries! We‘ve got your back. Try BYJU‘S free classes today!

Open in App

Solution

The correct option is C $O_{2}^{2 -} > O_{2}^{-} > O_{2}^{+}$
$Molecular orbital configuration for O_{2}^{+} is (σ_{1 s})^{2} (σ_{1 s}^{})^{2} (σ_{2 s})^{2} (σ_{2 s}^{})^{2} (σ_{2 p_{z}})^{2} (π_{2 p_{x}})^{2} (π_{2 p_{y}})^{2} (π_{2 p_{x}}^{})^{1} (π_{2 p_{y}}^{})^{0} (σ_{2 p_{z}}^{})^{0}$
$For O_{2}^{+}, bond order = \frac{6 - 1}{2} = 2.5$

$Molecular orbital configuration for O_{2}^{-} is$
$(σ_{1 s})^{2} (σ_{1 s}^{})^{2} (σ_{2 s})^{2} (σ_{2 s}^{})^{2} (σ_{2 p_{z}})^{2} (π_{2 p_{x}})^{2} (π_{2 p_{y}})^{2} (π_{2 p_{x}}^{})^{2} (π_{2 p_{y}}^{})^{1} (σ_{2 p_{z}}^{})^{0}$
$For O_{2}^{-}, bond order = \frac{6 - 3}{2} = 1.5$

$Molecular orbital configuration for O_{2}^{2 -}$
$(σ_{1 s})^{2} (σ_{1 s}^{})^{2} (σ_{2 s})^{2} (σ_{2 s}^{})^{2} (σ_{2 p_{z}})^{2} (π_{2 p_{x}})^{2} (π_{2 p_{y}})^{2} (π_{2 p_{x}}^{})^{2} (π_{2 p_{y}}^{})^{2} (σ_{2 p_{z}}^{*})^{0}$
$For O_{2}^{2 -}, bond order = \frac{6 - 4}{2} = 1.0$

Thus, the order of bond orders is:
$O_{2}^{+} > O_{2}^{-} > O_{2}^{2 -}$

We know that, $Bond order \propto \frac{1}{bond length}$

So, the correct order of bond lengths will be:
$O_{2}^{2 -} > O_{2}^{-} > O_{2}^{+}$

Suggest Corrections

thumbs-up

1

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}^{-}

O_{2}^{2 -}

?

Q. Decreasing order of stability of

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

O_{2}^{2 -}

Q. Bond orders of

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

O_{2}^{2 +}

in increasing order are :

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

O_{2}^{2 -}

respectively. Find the correct increasing bond order:

View More

Join BYJU'S Learning Program

similar_icon

Related Videos

lock

Bond Parameters

CHEMISTRY

Watch in App

explore_more_icon

Explore more

Bond Order and Enthalpy

Standard XII Chemistry

Join BYJU'S Learning Program

CrossIcon