How many of the following are paramagnetic species having $μ_{spin}$ (Magnetic moment) $2.8 BM$ ?
$N_{2}, O_{2}, B_{2}, C_{2}, C_{2}^{2 +}, N_{2}^{2 -}, F_{2}, O_{2}^{-}, {Li}_{2}^{+}, B_{2}^{-}$

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4 species

3 species

5 species

2 species

answer is A.

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Detailed Solution

Four paramagnetic species having $μ_{spin}$ (Magnetic moment) 2.8 BM.

$N_{2}, O_{2}, B_{2}, C_{2}, C_{2}^{2 +}, N_{2}^{2 -}, F_{2}, O_{2}^{-}, {Li}_{2}^{+}, B_{2}^{-}$

Species having 2 unpaired $e^{-} \to O_{2}, B_{2}, N_{2}^{2 -}, C_{2}^{2 +}$

Hence correct option is A.

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