NEET UG 2015 — Chemistry Inorganic Chemistry

$$B.O=\frac{{N}_{b} -{N}_{a}}{2}$$B.O=2Nb​−Na​​

$${O}_{2}^{-} \Rightarrow \sigma 1{s}^{2} <\overset{*}{\sigma } 1{s}^{2} <\sigma 2{s}^{2} <\overset{*}{\sigma } 2{s}^{2} <\sigma 2{p}_{z}^{2} <\pi 2{p}_{x}^{2} =\pi 2{p}_{y}^{2} <\overset{*}{\pi } 2{p}_{x}^{2} =\overset{*}{\pi } 2{p}_{y}^{1}$$O2−​⇒σ1s2<σ∗1s2<σ2s2<σ∗2s2<σ2pz2​<π2px2​=π2py2​<π∗2px2​=π∗2py1​

B.O for ${O}_{2}^{-}=1.5\Rightarrow \frac{10 - 7}{2}=1.5$O2−​=1.5⇒210−7​=1.5

$${O}_{2} \Rightarrow \sigma 1{s}^{2} <\overset{*}{\sigma } 1{s}^{2} <\sigma 2{s}^{2} <\overset{*}{\sigma } 2{s}^{2} <\sigma 2{p}_{z}^{2} <\pi 2{p}_{x}^{2} =\pi 2{p}_{y}^{2} <\overset{*}{\pi } 2{p}_{x}^{1} =\overset{*}{\pi } 2{p}_{y}^{1}$$O2​⇒σ1s2<σ∗1s2<σ2s2<σ∗2s2<σ2pz2​<π2px2​=π2py2​<π∗2px1​=π∗2py1​

B.O for ${O}_{2}=2.0\Rightarrow \frac{10 – 6}{2}=2$O2​=2.0⇒210–6​=2

$${O}_{2}^{+} \Rightarrow \sigma 1{s}^{2} <\overset{*}{\sigma } 1{s}^{2} <\sigma 2{s}^{2} <\overset{*}{\sigma } 2{s}^{2} <\sigma 2{p}_{z}^{2} <\pi 2{p}_{x}^{2} <\pi 2{p}_{y}^{2} <\overset{*}{\pi } 2{p}_{x}^{1} <\overset{*}{\pi } 2{p}_{y}^{0}$$O2+​⇒σ1s2<σ∗1s2<σ2s2<σ∗2s2<σ2pz2​<π2px2​<π2py2​<π∗2px1​<π∗2py0​

B.O for ${O}_{2}^{+}=2.5\Rightarrow \frac{10 - 5}{2}=2.5$O2+​=2.5⇒210−5​=2.5

$${O}_{2}^{{}^{2-}}\Rightarrow \sigma 1{s}^{2}<\overset{*}{\sigma }1{s}^{2}<\sigma 2{s}^{2}<\overset{*}{\sigma }2{s}^{2}<\sigma 2{p}_{z}^{2}<\pi 2{p}_{x}^{2}=\pi 2{p}_{y}^{2}<\overset{*}{\pi }2{p}_{x}^{2}=\overset{*}{\pi }2{p}_{y}^{2}$$O22−​⇒σ1s2<σ∗1s2<σ2s2<σ∗2s2<σ2pz2​<π2px2​=π2py2​<π∗2px2​=π∗2py2​

$${O}_{2}^{2+}\Rightarrow B.O=\frac{10-4}{2}=3.0$$O22+​⇒B.O=210−4​=3.0

$${O}_{2}^{-}<{O}_{2}^{+}<{O}_{2}^{2+}$$O2−​<O2+​<O22+​

$${O}_{2}\longrightarrow 16{e}^{-}$$O2​⟶16e−

$${O}_{2}^{-}\longrightarrow 17{e}^{-}$$O2−​⟶17e−

$${O}_{2}^{+}\longrightarrow 15{e}^{-}$$O2+​⟶15e−

$${O}_{2}^{2-}\longrightarrow 18{e}^{-}$$O22−​⟶18e−

$$\begin{matrix} & {O}_{2}^{+} & {O}_{2} \\ Bond order & 2.5 & 2\end{matrix} \begin{matrix}{O}_{2}^{-} & {O}_{2}^{2-} & \\ 1.5 & 1 & \end{matrix}$$Bondorder​O2+​2.5​O2​2​O2−​1.5​O22−​1​​

$$Stability\alpha Bond order$$StabilityαBondorder

Stability order $[{O}_{2}^{+}>{O}_{2}>{O}_{2}^{-}>{O}_{2}^{2-}]$[O2+​>O2​>O2−​>O22−​]