4.Chemical Bonding and Molecular Structure
medium

आण्विक आर्बिटल सिद्धान्त के अनुसार $O _{2}^{2-}$ आयन में अयुग्मित इलेक्ट्रानों की संख्या है...........।

A

$1$

B

$0$

C

$2$

D

$3$

(JEE MAIN-2021)

Solution

Molecular orbital configuration of $\mathrm{O}_{2}^{2-}$ is

$\sigma_{1 \mathrm{~s}}^{2} \sigma_{1 \mathrm{~s}}^{*} \sigma_{2 \mathrm{~s}}^{2} \sigma_{2 \mathrm{~s}}^{*_{2}}\left(\pi 2 \mathrm{p}_{\mathrm{x}}^{2}=\pi 2 \mathrm{p}_{\mathrm{y}}^{2}\right)\left(\pi_{2 \mathrm{px}}^{*}=\pi_{2 \mathrm{py}}^{*}\right)$

Zero unpaired electron

Standard 11
Chemistry

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