In which of the following, unpaired electrons are present? ${\rm{K}}{{\rm{O}}_2},{\rm{AlO}}_2^ - ,{\rm{Ba}}{{\rm{O}}_2},{\rm{NO}}_2^ + $

${\rm{NO}}_2^ + ,{\rm{Ba}}{{\rm{O}}_2}$

${\rm{K}}{{\rm{O}}_2},{\rm{AlO}}_2^ - $

NEET UG CHEMISTRY MCQ: CHEMICAL BONDING & MOLECULAR STRUCTURE

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Analyzing +4 | -1

In which of the following, unpaired electrons are present?

\mathrm{K}{\mathrm{O}_2},\mathrm{AlO}_2^ - ,\mathrm{Ba}{\mathrm{O}_2},\mathrm{NO}_2^ +

View answer and explanation

Correct option: C

only

\mathrm{K}{\mathrm{O}_2}

Option C (only

\mathrm{K}{\mathrm{O}_2}

) is correct because

\mathrm{K}{\mathrm{O}_2}

is a superoxide containing the

\mathrm{O}_2^ -

ion, which has one unpaired electron.