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Questions  

In NO3- ion, the number of bond pairs and lone pairs of electrons on nitrogen atom are

a
2,2
b
3,1
c
1,3
d
4,0

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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