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4.Chemical Bonding and Molecular Structure
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Number of molecules/species from the following having one unparred electron $15$. . . . . . $\mathrm{O}_2, \mathrm{O}_2^{-1}, \mathrm{NO}, \mathrm{CN}^{-1}, \mathrm{O}_2^{2-}$
A
$1$
B
$2$
C
$3$
D
$4$
(JEE MAIN-2024)
Solution
According to $M.O.T.$
$\mathrm{O}_2 \rightarrow$ no. of unpaired electrons $=2$
$\mathrm{O}_2^{-} \rightarrow$ no. of unpaired electron $=1$
NO $\rightarrow$ no. of unparred electron $=1$
$\mathrm{CN}^{-} \rightarrow$ no. of unparred electron $=0$
$\mathrm{O}_2^{2-} \rightarrow$ no. of unpaired electron $=0$
Standard 11
Chemistry
