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Which of the following statement is correct for $N O_{3}^{-}$ ion?

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Sum of all formal charges $= + 1$

Formal charge on one of the oxygen atom $= - 2$

Formal charge on nitrogen atom $= + 1$

Average formal charge on oxygen atom $= - \frac{1}{3}$

answer is C.

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Detailed Solution

F.C. = {Valence $e^{-}$ in free atom} $-$ {No. of non bonding electrons} $-$
No. of bonding electrons/2
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F.C. = $5 - 0 - \frac{8}{2} = + 1$

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