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In ${NO}_{3}^{-}$ ion, the number of bond pairs and lone pairs of electrons on nitrogen atom are

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a

2,2

b

3,1

c

1,3

d

4,0

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detailed solution

Correct option is D

In N-atom, number of valence electrons = 5Due to the presence of one negative charge, number of valence electrons = 5 + 1 = 6 one O-atom forms two (= bond) and two O-atoms shared with two electrons of N-atoms. Thus, 3O-atoms shared with 8 electrons of N-atom. ∴ Number of bond pairs (or shared pairs) = 4Number of lone pairs = 0

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ctaimg

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