Question

In $N{O}_3^{-}$ ion number of bond pair and lone pair of electrons on nitrogen atom are :-

• A. 2,2
• B. 3,1
• C. 1,3
• D. 4,0

Answer 1

Answer: (D)

In $N{O}_3^{-}$ion,
Due to the presence of one negative charge, number of valence electrons= $5+$ $1=6$

One $O$-atom forms two bonds (= bond) and two $O$-atom are shared with two electrons of $N$-atom
Thus, $3O$-atoms are shared with 8 electrons of $N$-atom.
Number of bond pairs (or shared pairs) $=4$
Number of lone pairs $=0$